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Favero Assioma Power Meter In-Depth Review


It’s been about three months since Favero announced their next generation power meter pedals, the Assioma.  These pedals would build upon the BePro units of two years ago, doing away with the complicated installation process while also adding in Bluetooth Smart support and a companion app.  Like the previous generation, they’d have a dual sensor solution (Duo), and a single-pedal solution (Uno).  And like the previous units as well, they’d be priced far better than most competitors.

Of course, my question is whether or not they’d be as accurate as the BePro units, as well as how well they’d handle day in and day out.  So I sit here about 45 days from my first ride with them, with plenty of data on these final production units.  Note that I did not receive these from Favero, but rather went out and got them myself from normal retail channels.  I’m impatient like that.

With that – let’s dive into things!



Wait, you wanted an unboxing video complete with weights?  No problem – here’s my Favero Assioma Unboxing video (and first ride data):

If you still want the photograph version of this, then I’ve still got ya covered!  Let’s start with the box:

DSC_9064 DSC_9071

Now the first thing is that not all boxes are created equal.  The boxes have a very important red dot on them in different spots, which indicates whether you’ve got the Duo or the Uno.  The Duo is the dual (left/right) sensing pedals, whereas the Uno is the single sided variant with only one power sending pedal.


It’s a smart way of differentiating without having to make two totally separate boxes.

Inside the box, here’s the goodness you’ve got if you crack open the lid:


Not gonna lie, it just looks super pretty above.  Really cleanly executed.  Down below deck I’ll take out all the parts sitting in little compartments. Sorta like a Bento box.


And here’s everything all placed out on a table:


To itemize those parts, there’s the charging cables, for which you’ve got two of (one for each pedal), and then they plug into the dual USB power adapter:

DSC_1804 DSC_1805

And of course, there’s a pile of outlet connectors for most of the world’s outlet types:


Then we’ve got the cleats.  These are Xpedo-based cleats, which are identical to those of the PowerTap P1.  They’re very slightly different than a Look Keo cleat.  For some people you’ll find a Look Keo cleat will work just fine for you, and for others (like myself), I find I clip-out a bit too much when not using the included (or similar) cleats.


Then we’ve got the pedals.  Since this is the Duo, both are power sensing inside.  Note, normally the pedals will be spotless perfect, but I can’t find the SD card with my perfect pedal pictures on it.  So, slightly used pedals you get at this juncture.

DSC_1816 DSC_1817 DSC_1815

Alongside that we’ve got a small stash of washers.  These are used as spacers attached to the pedal, to keep your pedals from pushing up against carbon cranks.  I usually install one spacer per pedal, but for your situation you may need two.


And finally, the manual.  Because everyone needs a manual.


Just for a quick look at sizes, here’s how these all line up compared to the PowerTap P1 and Garmin Vector 3 pedals (left to right: Favero Assioma, Garmin Vector 3, PowerTap P1):

DSC_1771DSC_1772 DSC_1769

(Above left: Assioma, Vector 3, P1…above right: P1, Assioma, Vector 3)

Got all that? Good, let’s get it installed.  It’s gonna take a while, you know, at least 1-2 minutes.



If you rewind two years ago to when Favero came out with their BePro pedals, you’ll remember the installation process was less than awesome.  It wasn’t horrible, but it wasn’t awesome.  It required special tools, stickers, tidal and moon patterns be just right, and then a bit of luck.  Plus, it required a ride or three of settling.

This time though with Assioma?  Dead simple.


But before we install the pedals you will need to download the iOS or Android app and activate the pedals.  If you don’t do this, they won’t transmit any power.  Personally I think this is stupid as it’s just going to increase their support costs for people that missed this step, but the logic is that it enforces the warranty period.


Once that’s done you take the included Allen wrench and then two pedals.  Also, stash a spacer or two on each of said pedals:


Then, simply twist the pedals into your crank arms.  It’ll probably take you 20 seconds or so per pedal:


And then you’re done. Really, it’s that simple.

When it comes to how hard you need to twist/torque them on, just go with ‘feels strongly snug’.  I haven’t seen any evidence that they have troubles if you don’t torque to a certain spec.  I’ve swapped them about every other ride just to test things, and it’s been solid on all rides.

As I do however, on all power meters, I usually will do a few quick sprints around the block to settle things before doing a zero offset.  So I’ll just sprint for 4-8 seconds and do it perhaps 2-3 times.  That’s it.  That helps ensure the pedals are nice and snug.

Then I’ll do a zero offset (I’ll show you how to do that in a minute).

Note that you will need to change/set the crank length.  You could do this with the phone app, or you can do it with your head unit.  This only takes a second though and is located under sensor settings:


Your crank length is usually printed on the inside of the crank arm, near where the pedal attached.  It’s often something like 172.5mm, 175.0mm or similar.

General Use Overview:


When it comes to using the pedals, things are pretty straightforward.  We’ve already attached the pedals to the bike and then set the crank arm length.  Ideally we also installed the cleats on your shoes.  If you haven’t, I’d suggest doing so.

The next step is ensuring that you zero offset the unit.  This is more commonly called ‘calibration’, despite some nuances there in the actual term among power meters users.  No matter, I recommend doing a calibration after install (+ a few sprints), and then usually once before each ride.  Doing a zero offset/calibration is helpful because it allows you to spot a problem before it becomes a big issue.  If you never zero offset you may not realize something is amiss.  Think of it as a health-check, more than a calibration.


On your head unit, once in the calibration menu, ensure that you’ve got no weight on the pedals, and then let it do its thing:


It’ll come back with a value of zero and a success prompt.


If you dive into the settings on some head units, you can also see the battery state of the pedals, as well as the manufacturer and sometimes firmware version:


This same data can be found on the Favero Assioma app as well.  It’s within that app that you can check firmware and update it.  At present there haven’t been any firmware updates yet.


The app doesn’t really do much else besides that.  It’s mostly just the initial registration/warranty piece and a quick status check.


You can however set power correction as well as convert an Uno set into a Duo set or vice versa.  Note that typically power correction isn’t for changing left/right balance, but rather for dealing with crank lengths of differing sizes.

DSC_1800 DSC_1802

When it comes to transmission, the unit broadcasts constantly on both ANT+ & Bluetooth Smart, also known as dual ANT+/BLE.  In doing so, it broadcasts the following metrics:

ANT+ Power (total)
ANT+ Power Balance (left/right)
ANT+ Cadence
ANT+ Pedal Smoothness
ANT+ Torque Effectiveness
Bluetooth Smart Power
Bluetooth Smart Power Balance
Bluetooth Smart Cadence

The ANT+ side of things is generally used on Garmin head units, as well as Wahoo, Stages, SRM, Lezyne and others.  Whereas the Bluetooth Smart side of things is generally used on Polar, Suunto, and various phone apps.  But these days Garmin’s 2017 products can connect to Bluetooth Smart as well, and of course so can Wahoo, Stages, Lezyne and others.

As a general rule of thumb though for power meters, when given the opportunity to connect over ANT+ or Bluetooth Smart, you should choose ANT+.  Why?  Well in most cases, especially for dual left/right units, head units handle that better in ANT+.  For example, Suunto’s devices can’t actually connect to both the left and right side of the Assioma (or even the PowerTap P1 pedals).  So instead you effectively just get left or right power doubled.  And other products sometimes have problems correctly ‘merging’ the two left/right sides on Bluetooth Smart.  Someday these problems will be fixed, but today is not that day.

On the flip-side, sometimes folks with wearables (like Garmin’s watches) will have problems in aero position and ANT+ transmission from some power meters.  In that case, giving Bluetooth Smart a whirl may fix the issue for some.

In any case, here’s a glance at what all those metrics look like on a typical ride with the Assioma pedals.  This was recorded on an Edge 1030, but would be the same across pretty much any ANT+ head unit. You can look at the full activity file here:



When it comes to charging, the Favero Assioma pedals use rechargeable batteries that are built into the pods themselves.  You’ll see the small contact points on the outer edge of the pod:


The USB-based charging connector then magnetically snaps onto these. It fits quite nicely, and illuminates once charging:


Favero advertises 50 hours of battery life per charge.  Here’s where I am on battery status: I had one battery die just yesterday, and I suspect I’m in the 20-25 hour riding range since the last full charge (which I’m pretty sure I did overnight).  At the same time, I had a TON of travel in the DCR RV over the past 2 weeks, which the bike was in.  My guess is about 20-25 hours of driving time easily, plus two transatlantic flights.  Which points me in the 50-65 total hour range, in the unlikely event that the pedals actually turned on the entire time I was driving.  It’s something we’ll have to keep an eye on.  Note that Favero says their testing on units shows closer to 65 hours.  Also note that you can put the pedals into a sleep mode while travelling, which would likely address what I saw.

In any event, the two charging cords connect to the dual-USB port power outlet:


The cables are nice and long, so it’s easy to charge them while still on the bike.

Also – I’ve seen some concern about what happens when the batteries ‘die’, apparently in reference to how you might swap them out.  Some of this is due to misunderstandings about how rechargeable batteries die.  First off is that batteries are generally rated to a certain number of recharge cycles, in the case of the Assioma battery, that’s estimated to be about 500 cycles (per an e-mail from Assioma).  Once it reaches that number, they don’t stop working.  Instead they might slowly degrade, perhaps to 80% of battery capacity.  With a battery life of 50 hours, and the 500 recharge cycles, that puts you at 25,000 hours of battery life before it starts to degrade.  That’s 24 years of riding 20 hours per week.  Or almost 50 years if you rode 10 hours per week.  Seriously, you’ll have long moved onto something else by then.  Battery cycle time is not your concern here.


Finally, a brief note about the pod durability.  The pods are internally sealed with a resin, which protects everything inside of them.  In my Favero BePro review two years ago I noted that in the couple months I used my set then, that the outer shell got damaged and I was concerned about long-life durability.  Thankfully, that turned out not to be an issue, and I don’t believe I’ve received a single complaint about that being an issue for the BePro units.  With Assioma, the company hardened the material even more, and thus I don’t think that’s an issue.

Still, I will note that at some point along the way my pods got a bit wonky.  To be 100% fair to these pedals, I have no idea if this was caused during a ride, or during transport or some other situation which is 100% my fault.  I generally treat gear like crap to see how well it holds up.  The pedal still works just fine, it’s simply that the rear of my Assioma is a bit squiggly.


Hardly something I’d be super concerned about, but I figured I’d at least mention it.  Either way, the company has a pretty solid warranty policy in the event that your pedal gets damaged far more than that.

Power Meter Accuracy Results:


I’ve long said that if your power meter isn’t accurate, then there’s no point in spending money on one.  Strava can give you estimated power that’s ‘close enough’ for free, so if you’re gonna spend money on something it shouldn’t be a random number generator.  Yet there are certain scenarios/products where a power meter may be less accurate than others, or perhaps it’s got known edge cases that don’t work.  Neither product type is bad – but you just need to know what those use/edge cases are and whether it fits your budget or requirements.

As always, I set out to find that out.  In power meters today one of the biggest challenges is outdoor conditions.  Generally speaking, indoor conditions are pretty easy to handle, but I still start there nonetheless.  It allows me to dig into areas like low and high cadence, as well as just how clean numbers are at steady-state power outputs.  Whereas outdoors allows me to look into water ingest concerns, temperature and humidity variations, and the all important road surface aspects (I.e. vibrations).  For reference, the Favero Assioma has a claimed accuracy rate of +/- 2%.  It also does not require any magnets for cadence, while also automatically correcting for any temperature drift. Both of these are pretty common though on most power meters these days.

In my testing, I generally use between 2-4 other power meters on the bike at once.  I find this is the best way to validate power meters in real-world conditions.  In the case of most of these tests with the Favero Assioma I was using the following other units on four different test bikes:

4iiii Precision Dual power meter
Elite Direto Trainer
FSA PowerBox
Power2Max NG and NG ECO
PowerTap G3 hub based power meter
Wahoo KICKR SNAP 2017/V2 Trainer
Wahoo KICKR 2017/V3 Trainer

In general, my use of other products is most often tied to other things I’m testing.  Also, when it comes to data collection, I use a blend of the NPE WASP data collection devices, and a fleet of Garmin head units (mostly Edge 520/820/1000/1030units).  For the vast majority of tests on the Favero Assioma I just used Edge 520 devices and an Edge 1030 unit.


Note all of the data can be found in the links next to each review.  Also, at the end is a short table with the data used in this review.  I’ll likely add in other data not in this review as well, once I finish consolidating that data.  I’m a bit behind on getting data off some of my head units into folders.

With that, let’s get right into it and start with analyzing an indoor trainer ride, in this case a 30×30 workout.  This is a trainer workout where the power shifts every 30 seconds from a recovery wattage to an interval wattage.  Here’s the overview of the workout:


In looking at the high level view, you’ll notice all three power meters are very similar, however the Power2Max NG does seem slightly higher during some of the work periods.  The Direto and Favero units are virtually identical throughout.  This slight difference is within range of the +/- 2% of both units, so that’s not something I’m terribly concerned about.

All the units react very quickly to the changes in power, with no obvious lag by any of them.

If we look at the nearly 900w sprints (the above charts are smoothed at 3 seconds), you’ll see the power meters again agree very well here:


Of course, anytime you look at max sprint power you’re going to get very slight recording/transmission differences between units – hence why you see them slightly different at the absolute peak power.

A better way to quantify that is by looking at maximal power graphs, which helps to remove some of those recording quirks.  Here’s how that looked:


This is where you see those slightly higher values on the Power2Max NG ECO come to light more clearly. It’s also where/why you see those early ‘drops’ impact the graph for the yellow line.  Those are likely just transient recording issues in my environment (I.e. WiFi/etc…), and not reflective of that power meter.  Said differently: It could have happened to anyone.

As for the Favero Assioma though, it looked really solid throughout this.

Let’s take a look at another indoor ride, this time with the FSA PowerBox and a Elite Direto trainer.  In this case this structured workout was at a bunch of different steady-state levels held for various lengths.  It’s interesting because it shows if there’s any drift indoors over the course of a workout. Note you’ll see double Assioma units listed here on the charts as I was recording on two head units at once (FR935 + Edge 820) to validate both recordings were identical.  I often do that in power meter testing.


Overall you see the three units are very close, except that the PowerBox seems to be slightly high until the 12 minute marker when I did a zero offset.  It’s a slight pattern I’ve noticed that it seems to need that zero offset more than I’ve seen with other units.  No big deal as long as you’re aware, but it’s super clear here.  Also, keep in mind we’re only talking a few watts beyond the +/- 2% range of both units combined.


In any case, back to the Assioma, which performs well here.  Seriously folks, just look at these graphs:


If they were any more alike, they’d be twins (ok, technically two of the four are twins).  But in that fourth interval we’re a mere 4w apart on 470w (so less than 1% difference).

I don’t need to belabor the indoor graphs anymore, there’s no concerns there.   Oh, but before we go – cadence looks good indoors too.  Compared to the PowerBox it’s identical, and very close to the estimated cadence on the Elite Direto (when it doesn’t struggle on cadence).


Now let’s head outside for a mountain ride on a cool/rainy day.  I like these sorts of rides as they allow you to see if there’s any issues in temperature drift as I climb.


With a 10-second smoothing the three units look near identical.  Starting off on the climb, you’ll notice I don’t stop at all, somewhat on purpose.  There’s a very slight dip in power as I go on a brief roller, but with not stopping that doesn’t give any units a chance to zero offset.  In my opinion, zero offsetting to compensate for temperature shifts is cheating these days, so I’m looking to see that despite this shift in temperature, all units track properly.  And if I zoom in on that 50 minute climb section, there’s virtually no difference between the three units.  All of about 3-5w in most cases.


Now what about descending?  That’s a different use case, as that starts to rattle the bike a bit more, which could impact accelerometers that are used in cadence (and thus power) measurement.  Here we see very slight differences in the units.  They all track almost the same plot, but within about a second delay (again, smoothed).  This is likely due to very minor differences in the algorithms for each as I stop and start pedaling around sharp mountain corners, and then the surges each time.


Practically speaking you’d never notice this while pedaling outside with just one power meter, as the numbers are the same at the end of the day.  It’s only really noticed with a bunch of power meters.  In fact, you’ll see this almost perfectly lines up to when the cadence values differ briefly for each power meter as I start/stop pedaling.


Let’s take a quick look at that mean-max graph though:


Pretty darn close.  A tiny bit of separation at the upper end, but about as good as you’re likely to get with three power meters in real-world out in the mountains on a wet and temperature shifting day.

Finally, one last outdoor ride to analyze, this time a suburban style ride with tons of stops and starts.  In this case I had 7 head units recording sensor data, three of which were recording Assioma (including wrist, tri aero bars, and top-tube placed units).  Really trying to validate all were seeing the same.


And sure enough, all the Assioma data sets were the same.  That generally tells me there’s strong signal strength on the unit.  While sometimes you can blame the head unit for weak reception (I.e. the Fenix 5/5S), other times you’ve just gotta call a spade a spade when boatloads of people across many head units have issues (Stages Power single sided units).

In the above case, if you thumb through the results, you’ll see absolutely nothing of concern.  Again, the data looks great between the units.  There’s one point where the PowerBox drops out for a second or two (around the 1:13 marker).  Which could be ANT+ related on the Powerbox, the Edge 520 that was recording it, or something else entirely.  That unit only had a second device recording it.

Instead, let’s just wrap-up with the Mean-Max graph here:


Despite a ton of stop and go, lots of surges, and all sorts of other fun city and suburban riding creativeness (including some rough roads), there’s almost no tangible differences here between the units from 15-seconds onwards.  Though interesting the PowerTap G3 hub did spike a bit higher than the rest on this one ride for the sub-15 second power.  Not sure why…welcome to the realities of power meters day in and day out when recording 3-5 units every ride.

Ultimately – looking at all the data I have – I see absolutely zero issues with accuracy of either power or cadence in the Favero Assioma pedals.  They’re solid.

(Note that all of these graphs are created using the DCR Analyzer. You can click on any of the links above to dig into the graphs on the site in more detail, or download the original data sets.  Alternatively, you can use the DCR Analyzer for your own comparisons.  Enjoy!)

Power Meter Recommendations:


With so many power meters on the market, your choices have expanded greatly in the last few years.  So great in fact that I’ve written up an entire post dedicated to power meter selection: The Annual Power Meters Guide.

I refresh that annual guide each September, and this September will be no different.  I tend to wait until after the Eurobike/Interbike trade shows to do so, though I don’t really expect any further new entrants this year at Interbike (could be surprised though!).

Until that post comes out in the coming weeks, here’s some new power meter reviews and previews that may be of interest that aren’t covered in that post:

A) 4iiii Precision Dual System In-Depth Review
B) WatTeam PowerBeat Gen2 Dual System In-Depth Review
C) Quarq DZero In-Depth Review
D) ROTOR 2INPower In-Depth Review
E) Power2Max NG In-Depth Review
F) Power2Max NG ECO In-Depth Review

Plus these options too:

G) FSA PowerBox
H) Stages LR dual system
I) Garmin Vector 3 pedals

With the Stages system though, you’re looking at later this year for a full in-depth review, as they don’t plan to start shipping till November or so.

But what about comparing the Favero Assioma to the PowerTap P1 pedals or Garmin Vector 3 pedals?  Well, having all three makes it somewhat easy to compare.  I’ve got a separate post I’m working on that dives into the details a bit more, but here’s the down and dirty version:

Favero Assioma: By far the least expensive dual option at $735-$799USD (the price keeps flipping around), and accuracy wise just as solid as all of them.  While availability is slightly constrained right now, I’m sure that’ll settle out in the coming months.  The only real downside here is the pods, which some might find visually displeasing.  But I suspect many won’t care given the cost savings.  You won’t get advanced pedaling metrics like Garmin’s Cycling Dynamics, or PowerTap’s app-driven metrics. And of course the batteries are rechargeable vs coin cell, but that’s just a personal preferences thing.  Seriously, Favero has nailed it here at the price point.

PowerTap P1: These have been around a few years now, and as such a fairly ‘well known quantity’.  They don’t have any pods, but are a bit chunkier than regular pedals.  They run on standard AAA batteries, albeit for warranty reasons require Lithium batteries which are slightly more expensive but still easy enough to find.  PowerTap does have advanced pedaling metrics, but they’re only available within their app platform and so it’s primarily used in the bike fit realm more than as a day to day metric.  Finally there’s price, which sits at $999 now, a price I believe to be slightly too high given Vector 3 now being offered at the same price.  I’d argue $899 would be the right price today given the market.  Still, up until this summer for the past two years they’ve been my go-to pedal that I travel with and use constantly.

Garmin Vector 3: It took three tries, but Garmin finally nailed it with Vector 3.  In many ways it’s what people always wanted – a pedal that was easily swappable and didn’t require pods or a pedal wrench.  It also just looks like a normal pedal.  It runs on LR44 coin cell batteries, which you can usually find in most gas stations or drug/grocery stores, and the battery life is solid.  It has the most advanced pedaling metrics of any of the noted pedal based power meters, and also makes that data easily available on all Garmin head units (but not 3rd party head units).  Accuracy wise, things generally seem good, but it’s still a bit beta for the next couple weeks – so you’ll have to wait for my full in-depth review once they finalize stuff.  For $999 though, I think it’s probably the winner at that specific price point.

All of which is a round-about way of saying that I think if you’re looking to spend in the mid-$700’s, then the Favero Assioma is probably the winner.  Whereas if you’re willing to spend $1000, then Garmin Vector 3 is probably the winner.

Note, I’m not including the WatTeam dual option in this mini-comparison for the very simple reason it’s not pedals.  I’m also not including the Polar or Polar/Look Keo pedals because…well…nobody cares about them anymore.  I’m not including the Xpedo power pedals because for 3 years they’re “going to ship in 2-3 months”.  Seriously, they’re not going to ship.



With the Assioma pedals, Favero came back to the table with modest updates that not only keeps their power meter pedals competitive, but did so while keeping their price market leading.  The addition of Bluetooth Smart is welcomed for those head units that support it, and more importantly the ease of installation and swapping from bike to bike makes this a real option for those that want to move them between bikes.  And of course, the accuracy continues to be very solid.

While the battery life is about a third that of Vector 3, and the pods are still present on Assioma, these are likely minor items for most people, especially given the price difference.  Further, the last two years of Favero being in the market with the BePro pedals I’ve seen almost no issues from readers on units.  Given my reviews seem to be the place people post issues, the lack of issues is telling (since I know plenty of units are being sold).

For those looking for a more detailed shoot-out between the three major power meter pedal options (beyond the previous section), look for an upcoming post where I’ll dive into little quirks like q-factor differences (shhh…doesn’t matter), cornering, and more.  In the meantime, feel free to hit up the comments section below.  With that – thanks for reading!

Found this review useful?  Or just wanna save 10%?  Read on!

Hopefully you found this review useful.  At the end of the day, I’m an athlete just like you looking for the most detail possible on a new purchase – so my review is written from the standpoint of how I used the device.  The reviews generally take a lot of hours to put together, so it’s a fair bit of work (and labor of love).  As you probably noticed by looking below, I also take time to answer all the questions posted in the comments – and there’s quite a bit of detail in there as well.

I’ve partnered with Clever Training to offer all DC Rainmaker readers an exclusive 10% discount across the board on all products (except clearance items).  You can pickup the Assioma pedals from Clever Training. Then receive 10% off of everything in your cart by adding code DCR10BTF at checkout.  By doing so, you not only support the site (and all the work I do here) – but you also get a sweet discount. And, since this item is more than $75, you get free US shipping as well.

Assioma single or dual sided pedals (US/World)
Assioma single or dual sided pedals (Europe)

Thanks for reading!  And as always, feel free to post comments or questions in the comments section below, I’ll be happy to try and answer them as quickly as possible.  And lastly, if you felt this review was useful – I always appreciate feedback in the comments below.  Thanks!

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  1. David Manley

    Currently clearing a di2 tt build off my credit card. Barring any major announcements on new products or price reductions before then I think I’ll be buying the single pedal version.

    Thanks for the review Ray

  2. Paul Fitzpatrick

    I don’t need them.. I already have crank based power on a road bike, CX bike and TT bike after selling my Bepros and switching…..so why do I want these so bad! Favero has nailed it I reckon and don’t see why you would buy any other pedal based system now… cue the counter arguments. :)

  3. Iain

    Helpful as ever when deciding what to purchase.


  4. Ken Jude

    I ordered after the “first look” post. Glad to see the full review changes nothing. Just need CT UK to get them in stock now!

  5. Andy

    If only the units I ordered, through a third party not direct from Favero, on the 21st July would turn up. They do seem to be slightly supply limited as you pointed out.

  6. rodrigo delgado

    awesome thanks for the review. quick questions. i went from shimano ultegra pedals to power tap p1s i found the platform small. the ultegras felt huge, are the assiomas close to the ultegra pedal in terms of size of platform or the power tap p1s

  7. Wojtek

    Can you set the transmit power as it is by bepro? Quite useful feature for the unfortunate Fenix 5 owners…

  8. George

    Are these pedals osymetric / q-ring compatible? (Vectors 3 are not compatible)

    • George

      So basically if you have osymetric or q-rings the P1 is the only solution from the three avove mentioned PM pedals…

    • mrlobber

      Why not compatible? The same inflated power readings as with any crank based power meter?

    • Correct, inaccurate readings. Physically they fit and all.

    • Jeffrey F.

      Could I ask where you got the info about osymetric incompatibility? I couldn’t find any mention one way or the other at their site, nor in the manual.

      I did find reference in a review at the5krunner.com that “oval/elliptical chainrings appear to increase the power reading by 2-4% depending on the ovality. POWER CORRECTION settings on the app can adjust for that if you like.”

      I have absoluteBLACK oval chainrings and would like to use them with the Assioma, if possible, if the error isn’t too much or can be corrected via an app setting…


    • I got similiar info to TFK from Favero directly. Not sure if it’s listed on their site elsewhere.

      The thing is though that the power correction setting won’t really fix it. It’ll just shift accuracy. See, oval/non-round rings accuracy will vary by cadence, not a set percentage.

      Of note: link to bikeblather.blogspot.fr

    • Jens Westergren

      Hello Ray, I have missed the not compatible with non round rings part. Could you please point me to some data or information on this? Is it based on cadence sampling?

      Best Regards, Jens

  9. Gabriel Vargas

    “look for an upcoming post where I’ll dive into little quirks like q-factor differences (shhh…doesn’t matter)”
    I’m REALLY curious about that!!

    • Bernard

      Q-factor of Assioma is claimed to be 54mm. I measured the q-factor of my Ultegra 6800 pedals, it is also 54mm. Ticks the box for me!

  10. bas

    If you want to buy these pedals, please consider customer service. I had a very bad experience with favero’s service. Had to pay more than EUR 200 for a repair which should have been warranty, but they just said ‘it’s your fault, not ours. If you don’t want to pay, ciao.. ‘ Never again for me (and I really never have issues with companies/warranties).

    • Paul Fitzpatrick

      As a counter, I had issues with one pedal of a dual system completely failing to send data. A few to and fro emails with Favero including some ride data and I sent it off, receiving a warranty replacement fairly promptly. Sorry you had a poor experience, never great, but I didn’t have that view.

  11. Rai

    You were testing P1’s at the same time as the Assiomas? Impressive ?

  12. KamilN

    Hi Ray,
    I’m looking for my first PM and considering between Favero Assioma UNO, Powertap P1S, Garmin Vector 2/3s. What do you suggest? Is Vector 2s still worth buying? Or maybe better wait for Vector 3s?

    • Any of those are solid, and honestly I’d just follow the same advice for the full-fledged versions noted above.

      I wouldn’t however buy Vector 2 at this point, primarily due to the pod stuffs.

    • Steve

      Let’s say that price is not a concern. Do you go for the Faveros or the V3s?

    • Favero is more or less available now. Vector is probably 2-4 weeks out.

      Vector gives you a slimmer overall unit though.

      I guess at the single-sided aspect, it’s less interesting for me to have Vector. Whereas in dual sided you’ve got a lot more data (albeit not entirely sure what to do with that data).

    • KamilN

      Thanks, that advice was useful, so probably I just stopped looking and made my decision.

  13. Kevin Morice

    Much with the other power meters I am still stuck with two issues.

    1. Can I change them easily between bikes? If not then price is by far the dominant factor as I need 3 or 4 units. Looks like these are getting there for movability?

    2. I change my components regularly, for pedals that means every 2-3 years and service them annually but I don’t want to be spending new power meter money that often. Are the pedal bodies, bearings etc accessible to refurbish them?

  14. Josh

    I got the Assioma Duo pedals yesterday after they were shipped from Florida to Hawaii and then to Massachusetts. I installed them last night and made a few videos. One of them is a Q-Factor comparison to the Shimano Ultegra PD-6800 pedals.

    I totally agree it’s not an issue, but the comparison might surprize some people since the results aren’t apparent at all by looking at the 2 pedals separately.

    link to youtube.com

    • Eric Tiffany

      Thanks for the video. I think your questions about Q-Factor and also shoe interference are answered by this Favero tech doc. link to drive.google.com

      In there, if you do the math (diameter of pod 33.5mm / 2 minus height of platform above centerline 10.5mm), the height of the pod above the pedal platform is 6.25mm, which is about the same or less than the height of a keo cleat.

      Also, another reviewer (the5krunner.com) posted this excellent picture of shoe clearance. I don’t agree with some of his other conclusions, but the picture is pretty clear. link to i0.wp.com

    • Steven Knapp

      But they do make note that in some situations you may need a shim for the cleat. If it really wasn’t an issue, why did they go through the trouble? Legacy from BePro?

    • Josh

      I checked it out tonight. I have a ton of clearance. Way more than 2mm.

    • Bernard

      Q-factor of Assioma is claimed to be 54mm. I measured the q-factor of my Ultegra 6800 pedals, it is also 54mm. Ticks the box for me!

  15. Seamus

    Amazing review as ever!
    Just wondering, I have Rotor QXL rings can I use these pedals with them?

  16. Tosin

    “I’m not including the Xpedo power pedals because for 3 years they’re “going to ship in 2-3 months”. Seriously, they’re not going to ship.”

    Best line in the entire article….

    I’m gonna wait to order these for the holiday season…not that they’ll be further discounted than what’s available on CleverTraining, but no rush.

  17. Thomas

    Any feeling if there will ever be a pedal-based power meter for SPD pedals? There have been rumors at times, also with Favero, but it seems nothing ever goes beyond the rumor stage.

    • I suspect we’ll see something again, ala what Garmin did with Vector 1/2 and Shimano support.

    • Also John

      I think I a lot of distance/endurance/touring cyclists would prefer to use a power meter with walkable cleats, but the manufacturers well know SPDs would also be widely used on mountain bikes where they might not hold up to the abuse. So we’re left with crank arm-based solutions such as Stages/4iiii/Pioneer or one of the various spider-based power meters to try to match up to whichever bottom bracket our bike happens to have. :-/

    • Thomas

      Not only that there might be more abuse on MTBs; the nature of the tracks might also influence power accuracy, I can imagine. So I completely understand that there are less dedicated off-road power meters. But no on-road power meter – is it that just the cleat is not large enough or is it purely that this market segment is too small? Sure, mountainbikers might also use an on-road power meter, but then abuse would be in their own problem, no? Same with 23mm tubes on a rocky downhill trail. I won’t blame Schwalbe if it blows up.

      Honestly, I’m biased, but if I had enough engineering skills and the ambition to launch a new power meter company – the SPD folks are what I would target. The best shot for a portable power meter that we had was Limits. Which, well, had its limits, to say the least.

  18. John

    Those pics really show how portly the P1s are!

  19. Neal Robertson

    Great write up as ever (literally don’t buy any tech until after a review on here) and extremely keen to go for these but just wanted to check if they were compatible with carbon cranks? I couldn’t see it explicitly mentioned. Thanks

  20. kiwi

    Hi Ray
    Thx for review.
    I’m little bit concern if fenix 3 is good enough “head unit” to use with assioma uno? I would not prefer to buy another device after buying power meter :)

  21. Steve


    1) Did you see any “bedding in” required with the Assioma pedals after transferring them between bikes before the power readings stabilized? I believe that was an issue with the bePro.

    2) Did you do any testing of the Assioma in Uno mode or just in Duo? Any reason to believe or data to show their accuracy and consistency are any different?


    • 1) No bedding in, beyond what I normally do which is just a few second sprint 1-2 times when I move pedals. That’s it.

      2) Just Duo. Uno simply doubles the left leg, so wasn’t something I was super interested in testing.

    • I’ve switched the pedals between bikes without any issue. Just performing a full reset and it was good to go from the beginning. They perform auto calibration.

  22. Jeffrey F.

    I think it’s important to note that the chunkier PowerTap pedals can hit the ground when putting in power during a tight curve on a fast descent, at least if you have 175mm or longer cranks. It almost killed me the first time, and despite that experience putting me into super-cautious mode with them, I still managed to scrape the other side a few months later.

    I will replace them with Assioma (thanks for the review!), and sell them to someone with shorter cranks.

  23. Deepak Rao

    Where did you manage to get them retail? I am not able to locate them in stock anywhere.

    • Clever Training. They’ve been shipping out units pretty constantly since the first week of August. Still backlogged, but also still a ton of units have gone out. I can try and find out how long the current backlog/queue is.

    • Bertram

      Ordered them at Clever Training UK at 14 august. Still waiting, though I got a mail that they have got a bunch, and are going to fullfil the first orders now. No idea if I am among them.
      Their site gives a “late september” date for new orders.

    • Deepak Rao

      Thanks Ray,

      I live in India, and was wondering if I could get a pair delivered to Philly by 22nd, as I am there for a few days. Have mailed Clever Training also.

    • I’ve sent a note over to the US side, and the person who’s generally tracking the Favero stuff should be waking up in a few hours. So I’ll have a better idea of where things stand.

      But logistically speaking, yeah, tons of folks send stuff to hotels/etc in the US while on travel.

    • Deepak Rao

      Thanks Ray. I get stuff ordered to a hotel all the time too, and my daughter studies in Philly, so address is not the issue. I am doubtful about whether the date would be possible.

      On 23rd morning I fly to Nice for a cycling vacation, and would love to use the pedals. My current power meter is a hub, and it’s on my titanium bike. This vacation I am taking a Bike Friday thanks to the absurd bike charges for flights to the US.

    • Ok, circling back on inventory from Clever Training. Essentially, all current backorders on the US side should be shipped by no later than Sept 25th, likely quite a bit earlier. There are multiple deliveries in route, and CT is getting weekly shipments – with the US and UK/Europe side alternating weeks.

      New US shipments for orders placed today, would likely go out on/about the week of Sept 25th, as part of that shipment coming in that week. That’s a pretty substantial shipment, but so are shipments to date.

      So a new order today wouldn’t likely make it in time for your Sept 23rd departure to Nice unfortunately. They did some digging, but all the current back orders would fulfill the existing units allocated to arrive before then. Sorry!!!

    • Aldo

      I don´t know if you can answer this, but why the price of Duo changed from 735 to 799 at CT? Early buyers deal?

    • Short version: Favero told them to. CT’s been pushing back, and is still working on it. It’s a bit weird because the way it works Favero sells products in Euros, not USD, and then retailers convert accordingly. In theory that should convert to $735USD (roughly), but Favero is forcing retailers to $799.

      All of which begs more questions. Obviously, anyone who ordered under the $735 gets it for that.

    • Aldo

      Many thanks. I imagined that but nothing like a inside explanation. Will wait until the end of the year to buy anyway.

  24. Markus

    These look really interesting. I sold my P1s after being replaced three times. Everytime the right pedal acted up and died then. Dealing with the importeur was always a lengthy process.

    However, I must admit, those new Vectors look sleek. Really nice … and no (ugly) pod. But I would never every buy a first gen product from Garmin again. So I guess Favero will see my money.

    • Jason

      It’s a 3rd gen product … It’s even called Vector 3

    • Markus

      I don’t care what marketing calls these. Completely new technology, so for me this is a first gen product.

      If it satisfies you I will call them first batch products in the future.

    • In the case of Vector 3 (like Assioma), both companies are leaning heavily on their past product experiences. When talking to the product teams at both companies, I’ve got massive bulletted lists of things they’ve taken into account from their previous iterations (Garmin Vector 1 and 2, and Favero BePro).

      But what’s not obvious to most consumers is how many versions both of these companies had under the previous product names. Vector 1 was in theory one product, but there were actually multiple variants within it over the first 12 or so months. A ton of tech changed there in that first year from a manufacturing standpoint.

      Even Favero also changed items with respect to the BePro pedals in that first year too, learning from their first few months. As did PowerTap and the P1’s.

      None of these companies are producing first gen products at this point. They are however, as you implied, starting initial production runs of the current products. And as is usually the case there are often small quirks in these first production runs. Some are noticeable to consumers, some not, and some not for months.

  25. Bertram

    Still waiting for mine….

    Question: I now use Shimano SPD-SL cleats, on two bikes (one for inside, one outdoors). What would you recommend, when I put the Assioma’s on the outdoors bike? Two set of shoes, or replacing the cleats on the indoors bike? (Al those just a bit different systems :(. It is a shame some manufacturers are so anal about letting others use their models).

  26. Andrew M


    You mention the Fenix 5 and their PM connectivity issues a couple of times (in your review, and in your comments).

    Did you test the Assioma’s with an F5, and did you notice any dropouts?

  27. mrlobber

    Another question: what’s the weight of Favero pedals? Garmin Vector 3’s are 324g, right?

  28. Orus


    If we are interested in buying pedal parts in 2 to 5 years, is Assioma a Winner ? Or Vector 3 is better because the company is older ?


    • It’s hard to predict 5 years out.

      On one hand, from a pure distribution standpoint you’re far more likely to find older Garmin parts, simply because there’s thousands of outlets that carry them. So someone’s likely to have them somewhere, even if just eBay.

      Inversely, with Favero, being a smaller company it’s probably easier to get those parts longer term from them, or at least have them sort you out a solution.

    • Orus

      Thanks Ray, this is something to consider before buying.

    • Orus

      Are the bearings standard ? I mean, can I find them somewhere else, even if Favero is dead ?

      Of course, I hope Favero will be still alive. ;)

    • Steven Knapp

      Favero has full tech specs on their website. Take a look at the drive Link Josh posted above. The bearings appear standard and user serviceable. But having said that I’ve not confirmed a second source.

    • I’ve bought some parts for bePRO on the past with no issues. Just ordered through them.

  29. Nathan B

    Hi Ray,

    Could you elaborate a bit between the Uno and the Duo?

    I’ve got a friend that’s looking to buy their first power meter, and I’ve suggested they look at the Assioma Uno as a start.

    Is there an upgrade path?

    Is one a slave and one a master (ie does it matter if you have the left or right Uno?)

    • The Uno is left-pedal only, and simply doubles the value to get total watts. There’s no magic beyond that.

      You can then upgrade if you want via upgrade kit to the Duo, and use the app function to pair them. The left remains the master throughout.

    • Michael Swann

      Bear in mind that if you start with left only and then upgrade, it will cost you more than buying dual sided from the outset.

      The price difference is of the order of US$150 more.

      This probably applies to whatever you choose (Garmin, PowerTap, etc.) and not just the Assiomas.

  30. Roberto

    I compared the values of my Wahoo Kickr with Assioma. They are strongly different, axiom on the values not low +40W approximately. How do I compare the two values to use Kickr rollers with the power sensor on the pedal? Thank you

    • Assuming that:

      A) You’re using the 2017 KICKR firmware (released earlier this year), and that you’ve done an advanced spindown afterwards
      B) And that you’ve done a calibration on Assioma, and have properly set crank lengths


      I’d suggest trying out the DCR Analyzer to overlay the two plots: link to dcrainmaker.com

      I’d focus on figuring out why they are different first honestly, as that’s a massive amount. Rather than trying to fake one of them to be like the other. Or as my Dad always said: Fix the problem, don’t hide it.

    • Nick Belkowski

      Hi Ray,
      I am also seeing some difference in power readings between my Assioma Uno and a 4iiii left-side only power meter. It is a smaller difference of ~12W @ 220W, but still big enough that it slightly throws off my previous power zones and FTP.

      Is it typical to see this kind of difference when switching between left-only power meters?

      How would you recommend transitioning to using only the Assioma…. retest FTP (and lose some relevance of previous power data) or use power correction in the Assioma mobile app to match my current FTP to the 4iiii?

    • Josh

      My L/R balance is 47%/53% on the Assiomas.

      If my FTP with the 4iiii was 250W, or 125W from my left pedal and doubled, that would work out to 125W L/140W R. Or 265W total.

      That’s a 15W difference just due to the 4iiii multiplying the left leg vs actually measuring both on the Assiomas.

      So your 12W figure is totally in the realm of possibility.

    • Nick Belkowski

      I understand there would likely be a power difference if one was dual-sided and one was single-sided, but they are both single-sided and measure the same leg…

  31. MikeS

    Someone’s always got to ask…any plans for a Speedplay body?

  32. jordi riu iglesias

    hello, I already have my fabero duo. My question can you turn off the pedal lights ??
    I guess you save energy

    good product

  33. Kate

    Great review.

    I recently received my Assioma Duo power meter pedals, but I’ve unfortunately run into a few problems using them with my Wahoo Elmnt Bolt. I’ve also found the power readings to be quite different from that provided by my Elite Qubo Digital Smart B+ trainer. I’m not sure if you tested the Assioma power meter pedals with the Wahoo Elmnt Bolt and/or compared the readings against that provided by an indoor trainer, but was hoping you may be able to shed some light on some of the oddities I’m encountering.

    For example, if I connect the power meter pedals via ANT+, I’m unable to change the crank arm length through the Wahoo Elmnt bolt head unit/app – the option just doen’t seem to exist. So the only work around is to set the crank arm length in the Favero app (however from the Assioma manual, this seems to be the less desirable way to set the crank arm length.) Oddly, however, the option to set the crank arm length via the Emnt Bolt does exist if the power meter pedals are connected via Bluetooth. I’m not sure if this is more of a problem with the Wahoo Elmnt Bolt as opposed to the Assioma pedals, but was wondering if you encountered this and what might be causing the disparate functionality.

    Another area I’ve had problems with is calibrating the Assioma pedals using the Wahoo Elmnt Bolt. When the pedals are connected to the Elmnt Bolt via ANT+, calibrating the power meter returns the following: “calibration compete torque offset 0”. However, when the pedals are connected via Bluetooth, I consistently get the following message after attempting to calibrate the pedals: “calibration complete torque offset 65535”. I also tried to calibrate the Assioma pedals when connected to TrainerRoad via Bluetooth, and I keep getting an offset value of -1. Any idea what could be going on here?

    Finally, and most importantly, I get very different readouts between the Assioma pedals (when connected to the Wahoo Elmnt Bolt via both ANT+ and Bluetooth) and the Elite Qubo Digital Smart B+ trainer (when connected to TrainerRoad and Zwift via ANT+ and Bluetooth). In all cases, the Assioma pedals show a power output that is significantly less then the indoor trainer. When connected via ANT+, the power readout from the Assioma pedals are roughly 40-70 watts lower than what the trainer says (although sometimes even more so), and when connected via Bluetooth, the readout is even more off from what the trainer says. I don’t know if this means the Elite Qubo Digital Smart B+ trainer was off all this time and I just didn’t know it, or if I perhaps have defective Assioma pedals. Another possibility is that one or more of the above problems (setting the crank arm length via the Favero app vs the Wahoo head unit when connected via ANT+ and very different calibration results when connected via ANT+ vs Bluetooth) are affecting the accuracy of the Assioma power meter pedals.

    Any insight you have on these problem would be greatly appreciated!

    • Hi Katie-

      As noted up above, I (and every other power manufacturer), pretty much strongly encourage folks to use ANT+ for power connectivity over BLE right now, for many of the reasons you noted.

      RE: Crank length on BOLT

      On most pedal systems with the BOLT you can set this via the BOLT companion app while paired. Failing that, you can set it once via the Favero app. The ANT+ protocal is defined such that it’ll keep the value in the pedals unless overwritten otherwise. For reference, the difference in crank lengths is roughly 1.45% per 2.5mm. So it doesn’t account for a huge swing if wrong.

      RE: Calibration on BOLT

      The ANT+ torque offset 0 value is the same I get on my Garmin. Different wording, but same resultant. Said differently – you’re good. Also, I presume here that you weren’t clipped in (no weight on the pedals).

      RE: Comparison between Elite Qubo

      The first question here is whether or not you’ve done a calibration of the Qubo. The Elite Qubo Digital Smart B+ isn’t exactly a super accurate trainer, and depends very heavily on having been calibrated properly with a roll-down.

      Shifts in accuracy of trainers like the Qubo are easy to spot as they often change over time during a workout as they warm-up. You could use something like the DCR Analyzer or another app to plot those (or just Excel). Analyzer here: link to dcrainmaker.com

      Once that’s done, if they’re still different then I’d likely lean heavily towards Assioma being right in that case. If you were comparing against something like the Tacx Neo, Elite Drivo, or others with a built-in power meter, then that’d be more mysterious.

    • Michal

      From what I’ve seen many times on Zwift facebook groups and other online forums, Elite Qubo Digital Smart B+ can be potentially very veeeery inacuarate out of the box. To achieve any accuracy with this trainer you need to go through painful process of calibration alongside power meter (and nothing is guaranteed). If you never did it then it probably just spits out random numbers. So I wouldn’t worry at all about Assioma accuracy when comparing it to Qubo or any other Elite trainer except their new generation (Drivo, Kura, Direto).

    • Luke

      Hi Kate,

      I’m having the exact same issues as you. Can’t set crank arm length when connected via ant+. Can’t calibrate properly when connected via blte. Without setting crank arm length, elmnt bolt readings much lower than my garmin 935 watch (where I can set crank arm length).

      Did you have any luck resolving any of the issues?


    • Ivan Murdock

      The difference I see with the bolt is the avg power. The power displayed and the NP remain accurate but the longer you ride the avg power continues to reduce. I don’t know if it is an algorithm issue from configuring the data from two sources. The avg power works fine, with 4iiii single side or wahoo kickr but with the pedals it doesn’t display correctly. When pulled into TP it shows a low average (just copies field) but if you highlight ride as a segment the avg power is correct. WKO4 and Strava both pull in the avg correctly. I have contacted Wahoo several times – it is either a low priority or they haven’t cracked it yet.

    • Deepak Rao


      I get this very issue with my Powertap hub and my Elemnt. Totally different type of calibration screen when on BT and on ANT+


      Another area I’ve had problems with is calibrating the Assioma pedals using the Wahoo Elmnt Bolt. When the pedals are connected to the Elmnt Bolt via ANT+, calibrating the power meter returns the following: “calibration compete torque offset 0”. However, when the pedals are connected via Bluetooth, I consistently get the following message after attempting to calibrate the pedals: “calibration complete torque offset 65535”.

    • Kyle Demerath

      I experienced something similar using my new Assiomas tonight on TrainerRoad for the first time. I was using it over BLE to my Android phone and the calibration returned -1 as well. Then when I started riding I noticed that the power on TrainerRoad was less than my 520 and my Fenix 5. At first I thought it was a calibration or crank length issue, but couldn’t find anywhere in TrainerRoad to change that so eventually I said screw it and just did the ride. What a realized during the ride is that TrainerRoad was only using the power from my left pedal and multiplying it by two (even though I have the DUO). My 520 and Fenix 5 were using the two pedals so they were matching and correct. This might be what Katie was seeing with her power being left. I confirmed this with single leg drills as well as looking at my power balance. I don’t know if I use the pedals over ANT+ on my phone if that will help. I had issues in the past trying to get the ANT+ to be stable on my phone but I will give it a try and see. Not sure if TrainerRoad is updating to get the power from both pedals or not on BLE…

    • Kyle Demerath

      Just to follow up, I connected to the pedals using ANT+ on my phone and the power was matching correctly with my head unit and was using both pedals, not just doubling the left. I actually contacted TrainerRoad as well and they confirmed that over BlueTooth, all two sided pedals report just the left side and double it for their app. Sounded like they are working on a fix, but there was no timeline.

  34. Jan

    Faverro service is not peerfect as could be expected or not they a good garantie on their Products.
    I had a charge Connector (micro USB) issue after abort 14 months on a bePro pedal.
    Repair did cost me 100 euro !
    They did repair the pedal without inform me of the cost. Took several weeks – they start claiming they could return after 10 days ….

    An the otter side – i have been happy with the bePro when not focusing on the charging

  35. Daren

    Thanks for the review Ray. Two questions;

    If running the UNO, is the second pedal a perfect match for a standard Look KEO? Switching one pedal would halve the time.

    Crashing is a part of racing, sadly. I’ve ground down the body of a carbon KEO, and generally abused a few others. Looking at the three candidates, which pedal body do you think offers the best crash resistance? I’m not proposing taking them to the belt sander, just some real world feedback!

    • The Uno kit includes a secondary pedal for the other side. Or are you asking something else?

      Looking at durability of all three, I find the casing on the P1 pretty darn durable and kinda built like a tank. But realistically all units can have the pedal bodies replaced cheaply in the event of a crash.

    • Daren

      My comment was really that if the pedals are sufficiently close to Look KEO in Q-factor and stack height, I’d just swap the left pedal between bikes. Which must be the fastest interchangeable power meter (Powerpod notwithstanding).

  36. D

    One other thing that i dont understund, is why nobody tell surface contact area of pedal based powermeters (except this is totay not important and just marketing on models they put this info as big advantage if this area is bigger)

    I was using Time Xpresso 10 pedals, and switched to Look KEO 2 Max Carbon, just to test Look system. When i realize i prefered vs Time, i ordered Look Keo Blade 2 Carbon Ti pedals. Blade 2 vs Max Carbon have bigger contact surface area, and also lower stack and i find them much better. Not sure how surface contact area help or maybe lower stack, but i feel them much better then Keo2Max Carbon.

    So im wondering how much of “just pedal” performance are compromised on PedalBased powermeters like Garmin Vector 3 (they have higher stack as i can see, like 12.5 mm and no information about contact surface area), and same question about Assioma Favero (they have 10.5 mm stack, and i ask them about contact surface area, they replied that someone from technical support will reply soon, and never happened).

    On reviews im reading no detailed things about just “Pedal carateristics” of them.

    Also i really like Non Grip LOOk Cleats (no creaking noise, they last very long…). Ray u are suggesting that u are not satisfied with Look Cleats on Favero, so u are using provided cleats , which have some rubber grip as i can see on the pictures. My experience with LOOK Rubber Grip version cleats, was a lot of cracking noise and not silent at all. So wonder how is the situation here as well?

    And to adjust my cleats i found usefull ERGON Look Cleat tool. When i bought compatible cleats their shape was a bit different then original, so could not use this tool. How is the situation about this with provided cleats?

    • I used the Xpedo cleats on the unit. Since the PowerTap P1 shares the same cleats, I had a pair already on my shoes there. Same-same.

    • D

      So i understund that XPEDO are exactly same shape as Original KEO’s so i can use the ERGON Tool for adjusting.

      And please comment Contact Surface area on Favero and Vector 3? How big is it compared to Look Keo Blade 2 pedals? And how smaller surface area compromise just pure pedaling quality? Similar question about higher stack on Vector 3 vs Blade 2 and compromised pedal quality because of that?

    • Yeah, I honestly don’t really have any comment on surface area. It’s just not something I mentally can wrap my head around, or at least, is something that impacts me. I pedal, and the bike moves. When it comes to the non-tech side of things, I’m simple that way. I’m sorry!

    • D

      Hmm.. As pedaling is primary function of Pedals, secondary function power meter, it’s a bit strange not mentioniong in the reviews their primary function. Maybe there can be the most advanced power meter function but if somehow compromise my BioMechanic and pedaling performance, then i’ll chose less advanced, but without primary function compromise. Or maybe will be reason to go crankset option.. Anyway thanks..

    • Perhaps.

      However I talked about aspects like whether or not the cleats were prone to popping in/out/etc, so that is a function of pedaling. And the function most people care about.

      But in the years of doing this, and thousands and thousands of comments left on the various pedal power meter reviews here – not once has anyone ever asked/hinted/etc about pedal platform surface area. Nor have I ever heard a single industry person ask/talk/discuss it in any presentations, events, press materials, marketing junk, etc… Never.

      Further, despite loads on bike fit, q-factor, stack height, float, and others – this also has never come up in anything I’ve seen from any major players or any other publication with smart people writing the posts.

      Again, I’m not really sure what to say here.

    • D

      if contact area surface was not important, we will be still on MTB style pedals i guess.

      And if that is claimed when u are buying regular pedals, and sometimes reason to choose one model vs another, very strange why u think it’s not important on PowerMeter pedals (since they are still pedals as first).

      But everyone can decide what is important to them. I was almost ready to order Favero, but until i dont get reply about this spec, i’ll just wait and post the same question on few forums (since i dont get answer from Favero about this).

      Maybe there is other people who think this is something important. If we find something interesting in that discussions, if u like i can post it here for ur followers as well..


    • Michal

      Guess what? Many people are still on MTB style pedals ;) One of the reasons is because area of contact surface is not that important when your shoe sole is rigid.

    • D

      Probably u read this from someone’s review :) that is not that important. So if its not important then why at all road pedals exist?

      Why not only one standard (MTB pedals), since they are more practical? Maybe Because contact area it does matter?

      I own three pair of Shoes, and all with stiff insole.

      1. Specialized S-Works MTB Shoes, and im riding them with CrankBrothers pedals

      2. Specialized S-Works Road Shoes (Look Keo Blade 2 Ti Pedals)

      3. Gaerne Stilo G.+ Shoes (same pedals)

      There is huge difference between S-Works MTB shoes/pedals vs S-Works Road shoes/pedals (put here Gaerne shoes as well if u want, same huge difference) . Specially on very long rides (even MTB SWorks insole is very stiff i can feel the pressure point from the CrankBrothers).Just to mention on all three pairs im using the same insoles (Specialized Blue version)

      Dont know what kind of rides u ride, but im riding ofen long distances (more then 200 km), and a lot of climbing (let’s say often between 1500meters to 3300 meters climb per ride).

      On this kind of rides the comfort and power transfer are very important and its totaly untrue that there is no difference between MTB and ROAD pedals/shoes if ur shoes are stiff enough (that’s how i got misleaded and rode few seasons with MTB shoes, until i tried my self).And i regretet that i just truested reading this kind of comments. Luckyly i had a chance to try and to feel that big difference so that how i bought my first pair of Road Shoes + Time Xpresso Pedals.

      In meanwhile i google it a little bit, and because im even simplier type of rider :) (worryng first about simple things like quality of pedaling, then advanced things like power meter in pedal power meter) i’ll share few words from what i found:

      link to biketestreviews.com

      700 mm² cleat/pedal contact, wider, taller and more surface area means higher power transfer and less foot rocking. With more surface area than a Shimano SPD-SL, there is absolutely no rocking back and forth of the feet”

      link to aerogeeks.com

      “LOOK claims that this provides a better surface for comfortable and efficient pedaling, which we’d have to agree with. Throughout our time with the Keo 2 Max Blades, our feet have felt stable and solid on each and every ride. We’ve especially noticed a difference at times when we really hammer down the power. There is a stability and stiffness there that is hard to describe exactly, but it’s definitely noticeable—and in a good way.”

      “The larger surface area provided for a ton of stability and power transfer, and the Blade technology worked as it should (with the added benefit of a flat surface on the underside of the pedal).”

      link to pezcyclingnews.com

      “From the very first click these pedals displayed the usual LOOK characteristics of a simple click in and solid feel but it was the extra surface area that set them apart from my other stable of Kéo pedals. Using exactly the same cleat as any Kéo pedal I was slightly skeptical of how big a difference the extra surface area would actually translate to in ‘feel’. The difference from the very first pedal stroke was immediate though with an extremely solid and connected feeling. In fact there was actually such a big difference in feel between the Keo Blade 2’s and my previous generation Keo’s on my two other bikes that I no longer wanted to use them..”

      link to road.cc

      “The big thing with the Xpresso pedal is it actually is just that: big. The pedal platform is visibly oversized with a 700mm2 surface area which is quite an increase from the previous iClic’s 445m2, something that should help with power transfer, comfort and cleat wear.”

      link to bicycles.stackexchange.com

      “Surface area – The size of the contact point on the shoe. This can make a difference in how evenly the pressure of the pedal is distributed to the foot.”

      Hope i helped a little bit. But everyone know whats best for him, for me simple things first :)

      And i’ll really appreciate if someone actually measure the surface area of Vector 3 and Assiomo since doesnt hurt, and can not see any negative side of that in the review (specially if its considered like detailed review), except beeing something that company’s who prouduce this powermeters try to hide that from some reason…

    • D

      I just post u a reply to ur comment providing some more detailed informations and arguments (with links to the source). But seem that Ray (or who moderate this :) ), didnt like it (since it’s question why no surface area info when there is no negatives providing that info), so he didnt aprove it. Ill continue this discussion on weightweenies forum. So if u are interested join me there (if Ray dont delete this comment again :) )

    • Holy crap dude, chill the f out. If you have two or more links, all comments go into a pending queue. Since I was sitting here as we speak in front of the pedals trying to figure out how to measure it for you, I didn’t yet have time to get on my laptop and approve it.

      Good lord.

    • D

      The status from Waiting for moderation, went to message dissapiared (and i went some effort to type it) . So that why i thought u deleted.

      Anyway, why so nervous when we try to discuss something which can be helpfull? And u not measuring just for me.. U are doing that for all ur followers, and of course if ur attention is to provide correct and honest review and opinion.

      And i really like how u reply .. Very good attitude from someone that seem to be NON Biased and provide honest review.. Keep going like that.. Really professional..

    • I’m happy to reach out to the companies and ask them.

      But I’m skeptical it means anything at all. Those articles you referenced read like press releases. Seriously. Out of curiosity, how would you measure the surface area? Look at your pedal now in front of you. It’s not a square area. it’s filled with curves and cutouts. And what part do you consider the surface area exactly? The part that comes in contact at the mid-foot that’s metal or another material? Or also including the tip of the cleat/pedal where the toe is? What about the rear portion along the edges? That’s partially in contact, but not totally. Meanwhile, between the mid and front portions the cleat doesn’t touch on any of the pedals I have here (power or non). So do you count that?

      There’s no accurate why for me to measure it. Thus, when I see people quote that 700mm2 figure, that tells me they’re reading from a press release to make them feel technical. Because there’s no way they measured it themselves and magically came to the same number.

      As for my attitude – it’s called keeping it honest and real. Each time you post taunting replies, my desire to help you is less and less (because again, it’s only you asking). If you don’t like it – there’s an entire internet out there you can find.

      Still, I’ll ask the companies and report back when they reply.

    • Orus

      In order to measure a surface area, you could take a picture and use a software.

    • True. Here’s a high resolution photo of all of them, plus a Look Keo pedal for reference, for those that want to try and figure it out.

      Photo (full res, 13MB): link to dcrainmaker.com

      Note: The first order of business will be defining what ‘surface area’ means precisely, per my post above.

    • D

      Since im not interested in review of ur attitude, ill let that part to the followers who are interested about it (specially the part: If u dont like it, go somewhere else on the net when i try to have discussion which maybe is important in main function….).

      Anyway get back on the topic we have: Surface Area, so please let’s keep the communication and discussion in this borders if it’s not a problem of course.

      Thanks for the picture of the pedals, and to have real comparation let’s compare to the HighEnd Pedals with big surface area not the Look Pedal u put in the picture (the users of this powermeters wont buy low level pedals, i guess they are interested in High End pedals). For this reason im attaching the picture of that surface area of Look Blade 2 Ti to be reference for comparation.

      If i did not feel improvement from smaller to big surface area, i would not mind it at all, but when i switched from Keo Max Carbon to Blade 2 Ti, i realized that surface area can be important, so thats why i post this topic.

      So let’s compare the picture im attaching, and lets analize potential contact surface (for me surface where cleat can have contact during pedaling. If there is some float, even that cleat have less surface, still while floating benefit from wider/biger contact platform of the pedal).

      And when i compare the pictures u send i can see one of the compromise the both Favero and Garmin do.

      They claim that they are not much heavier then regular pedals (but they dont compare this weight to lightweight pedals like Time Xpresso 10 or Look Blade 2 Ti which is about 108 gm and 125 gm of important Rotational mass difference), and to keep that weight i guess they cut the material from the Surface Area (and made compromise in primary pedal function).

      If they make the pedal with as big surface as pedals im comparing, they ll be probably much much heavier so that why make compromise here, and just dont post the information about that. This will be not a problem, if that is Primary Function Compromise. (And if Look and Time cut that surface willl be even lighter then they are, u got m point i guess).

      And now im even more interested how much they cut it from that area (to know how big potentional compromise is in main function).

      About part how to measure the area (of course after we defined it what is it, for me metal part where cleat can have contact during pedaling), Orus allready commented, but lets learn that together, since i never measure it my self.

      I found this software:

      link to imagej.nih.gov

      And tutorial how to measure it.

      link to youtube.com

      In this moment im not able to measure it my self (work) , but will try later or tomorrow

      Still, it will be the best beside this kind of measuring, to get information from the manufacturers them self, which can be considered as official (together with explanation how they measure and which surface)

      And will really appreciate if some of ur followers who switched from Keo Blade 2 to Favero Assioma , to share their own experience about this.

      Thank u

    • Michal

      Listen what this super smart bike fit expert has to say about contact surface area:

      link to youtu.be

      I have no reason to not believe that you feel discomfort in your feet using MTB pedals (hotspots etc.). But are you absolutely sure it is caused by contact surface area? Do you have 100% trust in your bike fit on MTB bike or MTB pedals/shoes combination? There is a lot of reasons that may cause feet problems.

    • Steven Knapp

      “So i understund that XPEDO are exactly same shape as Original KEO’s so i can use the ERGON Tool for adjusting.” – I confirmed both cleats fit the ERGON tool.

      But they are not exactly the same shape there are minor deltas.

  37. Anders Larsson

    Hi Ray,

    thanks for another great review. I’m currently using a Polar V650 and V800, which are Bluetooth devices. It would be great to have some stats around accuracy when using these pedals also paired to such devices, I know you said that you encourage people to use ANT+ for power connectivity over BLE right now, but it would be great to see some data before buying these pedals or any other power meter.

    • erin

      + can you calibrate, using a V800?

    • Pawel Nowak

      Hi Anders,

      I have Polar V650 working with Favero Assioma Duo. Due to bad weather condition I have managed to use them on the road only once. I also did some test while indoor training with Tacx Neo which is known for its power accuracy. In general: Favero Assioma Duo works properly with Polar V650. There is a tricky way to calibrate these pedals using V650. Comparing power measure accuracy between Tacx Neo and V650 I noticed that there is almost no difference between those devices while free ride on Zwift. Using ERG mode results in 1-2% deviation. There are 2 issues I have to investigate a little bit deeper: 1st – V650 does not report left/right leg force though in theory both Favero and V650 are able to do it (it reports power balance between L/R but not force area). This is rather a gadget so I am not special concerned about it. 2nd – form time to time right pedal seems to not report any power. This does not affect total power but I have to report it to Favero.

    • Scott W

      Did you manage to get anywhere with your issues? I’ve just fitted these to my bike today and tested them and I was getting some very odd results. The power values on the display while riding were showing half of the expected power and when I checked the L/R balance I had a 97/3 L/R balance showing.

  38. Asger

    I’m really struggling to decide between Assioma Duo and Vector 3.
    Can V3’s advanced dynamics really help with optimizing cleat positioning, or is it just bull…?
    I’m asking because of returning knee aches, which I hope to minimize with correct cleat positioning. Either try out myself or with the help of a bike fitter / physiotherapist.
    Thanks for a great site Ray.

  39. Josh

    I went for a first ride with my Assiomas yesterday. In general, I like them.

    One thing I don’t like is that the Xpedo cleats don’t have any rubber on the front lip, which means that my foot tends to slip on the ground when I push off to start riding. Makes for some awkward starts compared to my old Shimano SPD-SL cleats. And they are VERY slippery indoors! I have noticed that Look makes a “Keo Grip” cleat. I think I will be buying a pair of them.

    The blinking lights do indeed stay on for the entire ride!

    No rubber on the front edge:
    link to dcrainmaker.com

    Keo Grip:
    link to lookcycle.com

  40. Joost

    Great review! Any knowledge about the compatibility with the POLAR V650?

  41. James

    Great review as always. I’ve decided on the Uno which puts it in my price range. I currently use a 920XT for my rides and runs. Any feedback on possible connectivity issues? I’ve not had any with my Garmin speed and cadence sensors. Thanks.

  42. Max

    How do you put the pedals to sleep? so that they don’t ‘wake up’ during transport. I currently have the Assioma DUO; is there a switch I’m missing?

    Thanks for the great review btw.

    • I can’t quite find it in the manual, but I somehow remember somewhere that if you connect the charger for under 5 seconds, it’ll put it to sleep. To take out of sleep, connect charger again.

      But then again, perhaps I’m just thinking of something else now, as I can’t find it anywhere in the current manual online. I’ll double-check that again today.

    • Steven Knapp

      Saw mentioned how to wake the pedal: “When using for the first time, Assioma can only be switched on by connecting it to the battery charger with the supplied cable for a few seconds.”

    • Max

      I have already activated both the pedals and they’re working fine. I just saw in the review “that you can put the pedals into a sleep mode while travelling” which I though could be really useful.

      Thanks though.

    • Steven Knapp

      Sorry if not clear, my comment was that they can be woken, so it implies they can be put to sleep as well. Some procedure the factory does before transit.

      Hoping Ray/Favero can help clarify this as I could see the battery going flat during extended transport.

    • Max

      Oh right I see what you mean, yeah.

    • John Tisch

      Hi Ray. Thanks for great review, as always. I bought some of these pedals and will be flying 12 hours to Cape Town for the Cape Town Cycle Tour and would really like to put pedals to sleep for trip (and myself for this red-eye flight!). Did you ever find out about that elusive sleep mode?

  43. bdh

    wow..thanks for the pic (and link). exactly what ive been wondering.

  44. Sébastien

    I’ve bought the UNO, I just use my phone as a head unit …. and it doesn’t work (I tried Strava, Wahoo and a few other apps).

    I contacted Favero.
    They told me to try CatEye. I will when I’m out of office.

    And for calibration they told me to use TrainerRoad … which is far from being free…

    • Just to clarify, when you say ‘it doesn’t work’, what do you mean? To set calibration, or in general what happens?

    • Sébastien

      I mean it shows 0 power even if I’m pedaling…

      It showed the cadence in strava for a little while, but after I tried a second app (Wahoo fitness) it disappeared, now it is just showing Power:0W.

      I’ve tried restarting my phone, using an other phone, restarting the power meter, and a good number of apps …but not CatEye yet…

      I’ve had very little time to play with it for now, maybe it’ll get sorted out. I’ll post here if it’s the case.

      For the calibration I just told them I couldn’t find an app capable of doing it. In the manual they just mention “bike computers”. About that, they just answered “you could use TrainerRoad”.

    • Huh. That’s really odd. I’m not sure what to say there.

      As for the lack of calibration in the app – I’d agree that’s an oddity. I hadn’t really thought about a scenario of using a 3rd party app/device that didn’t support calibration (mostly because I often yell at devices that try and skirt adding that feature).

    • Sébastien

      So, I tried yesterday.

      CatEye doesn’t work any better than other apps. It shows a blinking 0.

      I tried Strava again too. here is a screenshot done while riding: link to goo.gl
      I never saw anything other than 0…

      On the plus side, the CatEye app does seem to have a calibration button. although I can’t vouch for its efficacy!

    • To be fair, zero is the correct value if it’s working.

    • Sébastien

      I don’t see how 0 would be correct … I was riding .. and pedaling.

      Anyway I got my hands on a garmin edge 510, did the calibration, problem solved. Power and cadence are displayed. Here is a new screenshot: link to goo.gl
      Still not being able to calibrate … and consequently use it … without a garmin or similar (costly) device is a bummer …

      And… I strongly suspect the values are divided by 2 …
      On a 23 minutes climb I did today, the power recorded with the powermeter is 1.7x lower than what Strava estimated last time I climbed it … despite being faster by more than 3 minutes this time…

    • Sébastien

      I calculated the power for today’s climb: 1.98x the power recorded with the power meter …

    • Sorry, I thought you meant that the calibration was done when you went out for an outside ride – not while actually pedaling. Meaning, like pre-ride.

      So the way calibration works, if you did that while pedaling it could have impacted calibration, since it’s looking to measure zero load. At the same time, most calibration routines will error/reject if there’s any cadence being shown.

      I’d agree that half the power sounds like something is amiss there. The Edge series doesn’t know anything about halfing or doubling power. Rather, it just does whatever the power meter says. I’d say it’s probably a good time to reach out to Favero Support and see what they say.

    • Sébastien

      I’m already in contact with them as I said.

      They’re on it but so far unable to reproduce the problem.

      In the meantime I made a little program to double the power values in a gpx file and I reupload it :)

    • Sébastien

      So, a little bit of progress: they say they can reproduce the problem with Strava.
      They have contacted them and suggest I do the same.

    • Sébastien

      Update on the halved values.

      Favero says it’s Strava’s problem, Strava says it’s Favero’s …

    • Chris Ott

      That really does not sound trustworthy. And that keeps me from buying an Assioma.

      I see 2 problems:
      1. No calibration without a “real” bike computer or with the Assioma app. I own no Garmin etc. I was planning to use the pedals with Strava on my iPhone (mounted on the bike) via Bluetooth.
      2. Power values are divided in half. You can read about it on the Zwift forums as well
      link to support.zwift.com

      Is there anyone who sucessfully has the Assioma working with a BLE connection and with Strava and Zwift?

    • To be clear: It’s 80% Strava’s/Zwift’s problem, and 20% Favero’s problem. Favero could change the way they are doing it to do whatever Garmin is doing on Vector 3 to have it appear as a single unit.

      But Strava/Zwift also treat all other left/right pedal systems the same today as well. And those systems act the same as Favero (exception being Vector 3 as noted).

    • Sébastien

      I actually got the strava support interested in the issue about a month ago after sending them the link to the zwift support where they say they’ll do a work around.

      But a few days later they added that:
      “Unfortunately, we cannot create a special rule for this device to double the power data due to an error on their side.

      I am going to try to reach out to see if they can correct the issue.”

      It’s been two weeks.

    • Chris Ott

      Thanks, Ray, for your fast response.

      This is a huge advantage of the Vector 3 then. And IMHO easily compensates the higher price of the Vector 3. Sorry Favero, but I do not want an ANT dongle on my iDevice. I think Favero needs to make this work when competing with the Vector.

      Now I am waiting for the BLE certification of the Vector 3…
      And hoping for an updated test of the Vector 3 with BLE and Zwift/Strava :-)

    • Kyle Demerath

      This is all similar to what I saw on TrainerRoad, though on TrainerRoad they double the left power over BLE – which I confirmed with their support, so I don’t know why Strava/Zwift couldn’t easily do that. It is what TrainerRoad does for all pedal based systems.

      One question about calibration – If I calibrate on my Fenix 5 do I also need to calibrate on my Edge 520 and TrainerRoad, or is only one unit necessary? I ride with all three running at once indoors.

    • A zero offset is saved to the power meter, and then ‘accessible’ from any further connected units.

      I’d argue that in general you see Strava and Zwift take a bit more ‘holier than thou’ position on most things. Usually wrongly so, but I can also emphasize with trying to deal with boatloads of vendors all asking for wonky-ass things.

  45. Josh

    I went for a 58 mile bike ride yesterday with the Assioma Duos. Another friend on the ride had the Assioma Unos.

    Two things.
    1. These cleats really suck compared to Shimano SPD-SLs. You slide when trying to push off due to lack of rubber on the leading edge of the cleat. You slide around when walking in the house. They are difficult to get situated on the pedal due to a shorter leading overhang edge than the Shimanos. It is hard to tell if you have the cleat positioned properly. And then it takes a lot of force to get them to clip in. I had to stand on the pedal a few times to get them to click. My pedals are adjusted about halfway for tension. I am going to adjust it to be lighter tension before my ride tonight to see if that fixes it.

    2. The pedals go to sleep very quickly when you stop. Not usually a problem, but my Garmin Edge 1000 refused to connect to the pedals again after we stopped at the top of a hill 30 miles in. So I rode the rest of the way without power or cadence. :( I believe the Garmin is the culprit here since I have had issues with my sensors disconnecting or not connecting manually recently. I have since done a full factory reset of the Garmin by holding the lap and start/pause button while turning it on to see if that fixes it. So far so good.

    I’m going to order the Keo Grip cleats and dump these Xpedo cleats. Hopefully that fixes one of my complaints.

  46. Bret

    I have had the Assioma pedals for almost 2 weeks now, and am very happy so far.

    In reading through Ray’s review and some of the comments, I’m trying to figure out the cleat situation. I have Look Keo Grip cleats (4.5* float) and it requires a great deal of force to click in and out. Almost to the point where I’m a little nervous about being able to click out. I have loosened the tension all the way, no difference.

    These cleats do have a full season on them, so that may be a factor, but they were pretty much effortless on my Keo Classic pedals. 6* is a little more float than I would like (for the included cleats), and I really appreciate the Grips when walking around. Thoughts?

    • Josh

      See my comment above yours. I have also had a really hard time clipping into these pedals with the xpedo cleats. I have had to stand up and really press down to get them to click. The adjustment is at about the 50% mark. I am going to try adjusting it lighter. I didn’t want to do it last night since there was a bit of sprinting involved on this particular ride. I’ll loosen them up and see if it helps.

      I also have just ordered some Keo Grip 4.5 degree cleats to see if that helps.

      It sucks that a decent power meter seems to be attached to a questionable (so far) pedal body. :-(

    • Jb

      Same, ice loosened the tension as far as it will go, but quite hard to clip in and out. Glad I live in the country where I rarely have to mid ride!

    • Ntinos

      They seem much easier to clip in and out compared to my Look Blade pedals(12nm), I’m using Look Keo Grey grip cleats with ~500Km on them

  47. Adam Syahir Umar Hamizi

    which one is great between assioma duo and power2max ng eco?. which one more suitable to student

  48. Josh

    I purchased the Look Keo Grip 4.5 degree cleats, and the difference is night and day compared to the stock Xpedo cleats. I can push off. I can clip in much more easily. I can tell when the cleat is engaging the pedal. I don’t have to stand to get it to click. And I’m not going to kill myself in the house because I’m not sliding all over my floors.

    I haven’t had any issues with the cleats disengaging when I don’t want them to, either.

    Everyone with these pedals should swap to these cleats. So much better!

    • Bret

      Good to hear. I had some non-grip 4.5* Keo cleats in my spare parts stash, and it’s better, but still tougher than I would like for clicking out. The non-grips are suicide on hard surface floors though, so I have some new Grips on order.

  49. James

    I’ve seen a couple of times my L/R was way out of the normal range, and the power was also out (too low in one case, and too high in another case). I did a zero calibration mid ride, and it brought values back to what I expected. I’m now doing a calibration before each ride just in case. Anyone else seen this?

  50. Ntinos

    I’ve bought my Assioma Duo from Clevertraining Europe. Unfortunately I only got one charging cable instead of two, Clevertraining hasn’t responded yet to my mails (already 4 days). Has anyone faced similar issues?

  51. Mike

    Hi Ray, I am planning on buying the assioma duo pedals and a bike computer. I am trying to decide between a garmin edge and the wahoo bolt. Which do you think works best with the assioma pedals? Thanks for your effort in putting out these reviews.

  52. Hi Ray,

    Are there known issues with shoe rubbing on the pods?

    I run a size 9 (US) Sidi Genius 7 Carbon for reference.

    Thank you.

  53. Jan Sprenger

    Hey, i think of buying the assioma duo. You know if they are compatible with my suunto ambit peak 3?
    Thanks alot

  54. Luke

    Hi Ray,

    It could be worth mentioning in your review that the Favero Assioma will not give accurate readings with the Wahoo Elemnt Bolt (and I am guessing the Elemnt) IF you do not have a standard 172.5mm crank arm length.

    When I first got my Favero Assioma pedals I still had a G3 hub and was using a garmin head unit where I could change the crank arm length (my crank arm is 170mm). Both power meters corresponded well when they were both recorded on a garmin (one was on the 520 and one was on the 935 forerunner). Hence, I know the Favero Assioma is accurate when crank arm length can be set.

    Then, when I got the elemnt bolt, it is not possible to change the crank arm length for the favero assioma. You can change it in the assioma app, but the head unit overrides it to its default (i.e. 172.5mm). The readings (935 compared to the bolt) are greatly different. For example, average power for a 1hr ride was 129 on the garmin compared to 92 on the bolt.

    I contacted Wahoo and got the below response. Could be worth having a disclaimer/warning in your review for those elemnt owners out there.

    “Hi Luke,

    Thank you for reaching out to us! Unfortunately at this time, setting the crank length for Favero Assioma isn’t an option, however we are currently working on being able to set crank length for your specific power meter. I’m not sure when it will be available in a firmware update but we are working on it.

    I’m sorry for the inconvenience.


    • Hmm, I’ll reach out to them and get clarity on why this is. They support the ANT+ standard for setting crank lengths on other ANT+ power meters (PowerTap P1, Vector, for example). So not clear if it’s a Wahoo issue or a Favero issue. Either way, I’ll poke and circle back.

    • Luke

      Thanks Ray! I’m sure you will have more influence than me and hopefully will give them a kick up the ass to get the firmware updated ?

    • John

      I was really keen to purchase the Favero Assioma Duo and am glad I just read the comments here. I have a Wahoo Element and a bike with a 175mm crank. I don’t want to buy a power meter that is giving an inaccurate reading. Hopefully this will get sorted but I will be waiting or looking elsewhere. Fingers crossed Wahoo/Favero will fix this in the next firmware update. Ray if you hear anything please let us know ASAP. Thanks!

    • Luke

      Hi guys,

      Just thought I would let you know that I got an update from Wahoo (see below).

      “Hi Luke,

      Thank you for reaching out to us! This is scheduled to come out in the next firmware update. At this time, I do not have the date of when that is but it is planned for the next update.

      I’m sorry for the inconvenience.


    • John

      Hi Luke

      Thanks for letting everyone know. I will probably buy these soon now as they are just what I am looking for. I think firmware updates from Wahoo for the Element roughly tend to come out once a month so I can’t imagine there will be too long to wait. Fingers crossed!


    • Ade Hughes

      I noticed this but it’s also true for my 1st gen Garmin Vectors. When I contacted them the impression I got was that they’d somehow accidentally regressed the functionality. Luckily I’m on 172.5’s…

    • Ade Hughes

      Clarification – by “them” I meant Wahoo!

    • John

      I completed a ride on the trainer last night and there does seem to be a major difference with the calculated average power that the Elemnt (and the android companion app is showing). I compared the two on the attached spreadsheet.

      The element is showing an average of 137 watts and Strava (via Zwift) is showing 194 watts. If you look at the download raw data for the Elemnt and zwift they are within 1 watt of each other at 194/195 Watts. Yet the calculated power %FTP on the Elemnt seems correct for 194 watts. Is it simply just a matter that Elemnt is not displaying the correct field for average power (just a guess)? Does this happen with other power meters? Any thought or ideas that we can make available to Wahoo?

      I’ll forward my findings to Wahoo.

    • John

      I’ve just noticed that I can’t attach files but hopefully there is enough in the message with regards to my findings.

    • I don’t see the attachment (it mostly only accepts pictures) – can you upload just a photo of it? Or simply shoot me an e-mail using my first name at my domain name.

    • John

      Hi Ray. Yes of course I think it might be too big for a photo. I will send it to you via email. Could you let me know you have received it ok.



    • In looking at the files John sent, it’s recording the power numbers properly – and the two are incredibly close.

      My guess however is the large gap in the middle (I assume you stopped for ice cream or something). Here’s a link to the set: link to analyze.dcrainmaker.com

      The ELEMNT appears to be doing averaging inclusive of the stopped time (thus bringing down your total power average. While Strava and Zwift don’t include zero’s in the power average. It’s a bit of a religious debate on which method is best.

    • John

      Thank Ray. Yes there was a stop but the element did auto pause (it’s not the weather for ice cream in the UK at the moment!, I was actually helping out my OH car stuck in the snow). I’m going to try a short ride later and set the element to not include zero power and not stop at all and see how the figures compare.

    • John

      I’ve tried a couple of rides over the weekend and the Wahoo is still reporting a much lower than Zwift/Strava average power with or without zero’s excluded (and zero stops). Yet other power data from the Wahoo such as normalised power and Intensity factor are comparable.

      It seems a little odd it almost (and this is a complete guess) that the average power that is being displayed is not actually average power, but the correct average power is being used to calculate other power metrics.

      I’m not sure if anyone out there could try the Favero Assioma with both a Wahoo head Unit and maybe a Garmin head unit and see if there is a difference in average power?

      I’m going to keep collecting data for rides and forward to Wahoo.

      In practice I suppose average power is not that important a metric it is really normalized/weighted power that’s important. Still seems odd though.

    • Chris

      i see the same thing and it seems like a bug to me, the total avg power that wahoo displays just seems wrong.

      i took a raw .fit file created by the bolt and averaged all the power readings (incl zeros) and it matches up with the average power displayed in strava, the avg power that the wahoo app shows is 40 watts low. It is definitely not reading low – the captured values are correct, the instantaneous (3s, etc) averages displayed on the device are correct, and the NP are all correct, there just seems to be some issue with how they are calculating the avg power.

    • If you’ve done the math, then honestly my suggestion would be to either file a bug with Wahoo (since it’s not likely an Assioma problem), and/or pop a post onto the BOLT product review (which Wahoo engineers/support do follow pretty constantly).

    • John

      Thanks Ray/Chris. I’m going to go for another ride and see what happens record the data and send it across to Wahoo (I have a support ticket open). I would suggest that others do the same so they have representative data. It seems like the Assioma is spitting out some good data and I’ve been really impressed with mine so far. It seems unlikely that the crank length is making any difference – it should really be set in the Assiomoa from the Favero app anyway and stay like that.

      It’s been great with Ray’s help we’ve been able to delve into this and work out what is going wrong.

      I don’t want to come across as overly critical I am a really big fan of my Wahoo Elemnt for the year that I have had it. Been the perfect cycle computer for my needs. However it would be good to try and iron out this odd little bug.

  55. Jorge

    Hi, For those who have bought the Assioma DUO’s from CT uk. How long did you had to wait from submitting the order and actually receive the product?

    • Jakub Siska

      I have ordered on 24/9 and still waiting.
      The order has shipped (20/10), but for some reason it is still stuck in UK (last tracking status said, that it has been sent to national returns center). I have contacted clever training UK about it, but have no answer after 2,5 days now. The amount of time they take to reply to customer questions can be really frustrating.

    • Jessy

      I ordered mine on 9/23 from Powermeter24.com and heard nothing since…. I’m in the US

  56. Bryan

    Is the shoe rubbing on the sensor a real problem? What about if you wear shoe/rain covers? I wonder how much rubbing it would get then? This is the only sticking point for me. Otherwise I’m sold.

  57. Olivier

    Hi Ray and Other People,

    I read most of the cleat-oriented comments and I can’t seem to find an answer to my question. Here is the situation (#jerseyshore) : I have two bike, both of them with SPD-SL Shimano pedals, but only one pair of shoes with, you’ll guess, Shimano cleats. I’m considering buying the Assioma pedals. My question is : what should I do? I see three… four… five… options :

    1. Put the included Xpedo cleats on my shoes, put the Assioma on bike1 and get basic Xpedo pedals for bike2. (Are Xpedo basic pedals ok? I also read people complaining about the lack of grip on the included Xpedo cleats).

    2. Put the included Xpedo cleats on my shoes, put the Assioma on bike1 and get basic Look pedals for bike2. (We read a lot about the Assioma being Keo compatible, but are Look pedals Xpedo compatibles? Also, that doesn’t solve the grip problem).

    3. Put new Keo Grip cleats on my shoes, put the Assioma on bike1 and get basic Look pedals for bike2. (Some people find it hard to clip in/out of the Assioma with Keo cleats, is this really an issue? As the Keo cleats get older, will it become more and more difficult to clip in/out of the pedal because of compatibility issues?).

    4. Get a second pair of shoes with Keo Grip/Xpedo cleats, put the Assioma on bike1 and keep the Shimano on bike2.

    5. … ??

    Any advice would be appreciated. I’m lost.

    Thanks for reading!

    • Jessy Bellmann

      I would say get an extra pair of shoe for the shimano SPDs, it would be cheaper. Technically you can Swype them back and forth but do you want to do that?…. the lack of grip from the xpedos people talk about is from the float of the regular ones that come with it.. just get the black cleats instead..
      – Also there’s another option, you can buy the assioma pedals without powermeter they make both side, like that you can just use one shoe:
      bike1 with assioma powermeter and bike2 with the same pedals has the assioma but without power
      Like you don’t have to change anything and get used to the Favero Assioma pedals nd cleats feeling..
      I hope it helps.

    • Jessy Bellmann

      It might be the same has the xpedo pedals but I can’t comment on that, I don’t own xpedo pedals

  58. Andi


    I’d be interest to know if somebody has managed to get moreless
    reliable power data using an app other than the one by assimo,
    e.g. using Bluetooth and an iOS device.
    If yes, how did you calibrate.

    Thanks for your advice,


    PS: Anybody tried to put the left, right pedal of the DUO onto differ bikes?

    • Sébastien

      I’m on android, I was unable to calibrate from the phone because no app could do it … I don’t know if the picture is any better on the iOS side.
      I ended up using a garmin that someone lent me.

      Now it is “working”. I have the UNO variant and the power seems accurate … but halved.
      Favero is aware of the problem but so far no news on that front (it’s been one month).

  59. Vitaly

    Im heavier rider (235 lb). It seems like Vector 3 will not support me so the Assioma would be better solution, What that be a correct statement ?

    • Definitely an option. As is the PowerTap P1.

      I compare them all here: link to dcrainmaker.com

    • Vitaly

      Based on your comparison I’m leaning towards Assioma

    • Vitaly

      Got mine yesterday and put them on the bike and did 50 miles on the trainer. Everything is great about them !!!!

      The only thing is coming from Shimano I can’t get use to the filling of play that the pedal has. Currently have 4.5 degrees. Don’t want to go to a 0 since I did not like a 0 on my shimano as well.

      Most likely will put them on the Ebay since I cannot return them :(

    • Josh

      The red cleats that come with the Assiomas have 6 degrees of float. And they kinda suck.

      The Look Keo Grip grey cleats have 4.5 degrees of float and are a lot better. I like these. Just make sure they are tightened down tight!

    • Vitaly

      Tried the gray ones nice and tight :) Just overall feeling that I don’t like

  60. Kostis Petrakis

    Thanks Ray, for the excellent review!
    I’ d like to ask you, which ones Power Meter is more accuracy, BePro or Assioma?
    I had BePro on year now without issues. Is there a reason to go for Assioma for more accuracy?

    • From a tech standpoint, no, I don’t see Assioma as anymore accurate than bePro.

      However, what Assioma has that bePro doesn’t is easier install and that it doesn’t take a ride or two for settling. So if you lave your pedals on the same bike – then you’re unlikely to notice any accuracy tweaks. But if you change bikes constantly, then you will definitely see higher accuracy with Assioma.

    • Kostis Petrakis

      Thanks Ray!
      Very helpful answer!

  61. Christian Holmstedt

    Thanks for the review. Detailed as usual.

    I’m using the BePro S from Favero now and they have been solid with the minor inconvenience being the installation.
    Favero seems to have nailed it this time…… except for one detail pointed out in the review.
    Is it actually required to ‘activate’ the pedals via an App on a Smartphone?!!
    If this is true they really screwed up. I have a Smartphone but it’s of the Windows kind and not surprising there is no Favero App for Windows Phone.
    Most people have a smartphone now but this seems to be really stupid.

    With the BePro pedals there is no need to do this. There is a regular (desktop) Windows program for firmware updates and other advanced settings.

    Can you confirm this?

    • Christian Holmstedt


      Is a Smartphone required to activate these pedals?

    • Yes, it is required. I cover this in the review a bit (with some frustration as well at the idea).

      You’ll need either an iOS friend or an Android friend. I totally understand not supporting Windows Phone, though, I don’t get not having a desktop updater for Mac/PC.

    • Christian Holmstedt

      Thanks for the reply.
      I know it was mentioned but just wanted it to be 100% clear to everyone!

      Sadly Favero has made a great product and completely messed it up at the same time.
      No program to activate and update firmware from a regular PC/Mac is simply inexcusable.
      (Sure the Windows Phone non-support was expected).

      My bePro S system is great but they will not get my money the next time I’m in the market for another power meter.
      They stumbled and fell on the finish line….. and didn’t finish. Boooooooo!

    • Michal

      You’re overreacting greatly. I don’t know a single person who doesn’t have Android or iOS smartphone, except my 90 years old grandmother. This whole activation procedure is weird, and probably unnecessary, but in reality it is non issue. If some people live under the rock it is their choice and their problem. In 2017 almost every electronic fitness device requires smartphone for firmware updates, calibrations, changing settings, additional functionalities etc..

    • Jessy

      Hey buy cheap chinese android phone with a high android firmware and you’ll be fine, I know it sucks to dish out extra money just to set it up but that’s a way you can do it for cheap

    • I’d argue to just find a friend with an Android or iPhone for 2 minutes. It’s all you need them for. Or take the pedals to work and find a coworker there.

      This was similar to an issue that Wahoo had years ago for the KICKR when they first introduced it – just an iOS app for firmware updates for a year or two. While not ideal for many, most people could convince a friend to help them out in exchange for a bottle (or case) of beer.

      With Assioma, it’s just a one-time thing, and doesn’t require being on/near a bike. You could probably even go down to your favorite sandwhich shop and ask someone too to help. :)

    • Christian Holmstedt

      Well, sure I get but it’s a completely unnecessary requirement and there are weirdos like me who use a Windows Phone for example…

      Thanks for your replies anyway.

  62. Kostis Petrakis

    Thanks Ray!
    Very helpful answer!

  63. Max


    I have the Assioma DUO. For anyone that has used these pedals with Zwift, I can only connect to either the left or right pedal by Bluetooth but I can’t connect to both pedals to combine the readings. It shows up on Zwift as two separate devices.

    Anyone know how to fix this?


    • Sébastien

      people are complaining here: link to support.zwift.com

    • Yeah, not much you can do there to be honest. In a nutshell, many apps and devices don’t follow the BLE spec there (for example, Suunto as well).

    • Jorge

      Why don’t you use a ANT+ receptor? IMHO for power it works better then BLE.
      A receptor is pretty cheap (~10€). Search for “ant mini usb” in aliexpress. I have a couple of those and they work flawless!

    • Max

      Yeah, just bought one off amazon. Just didn’t want to waste any money buying an ANT+ dongle if there was a quick fix to the problem.

    • Sébastien

      I actually bought an ant+ receiver a few days ago for use with zwift.

      But putting that aside, I have an android smartphone that I’ve been using as a bike computer for a while and it does a great job. I don’t see the point in investing in a (costly!) garmin when I’m already carrying around a bigger, brighter, more responsive, and more powerful device…
      And when a power meter is advertised as having bluetooth I expected it to work properly…

      But I have the UNO variant and the power is halved everywhere (well, strava, zwift and bkool at least)…

      I’m not sure it’s entirely favero’s fault, but the end result is that the experience for a bluetooth user is bad out of the box right now…

    • Jorge

      No need for a Gamin. An android with a OTG and a cheap ant pen will do. The ant pen can also be used in any computer. The thing is, an ant sensor (speed/cad/hr/power) has a device profile (call it a contract) and it works. BLE is an open standard but still there is no “contract” for sensor profiles. So each brand can have its own implementation. And its always easier to blame the other side for not supporting something. For updating / managing hardware/firmware BLE is better and easier to implement. But for stability I think ant+ is better.
      Also have a couple of HR a speed/Cad combo ble only. No problem with HR but the S/C combo is detected only by some head units. Even on an android the combo is detected as BLE but IpBike identifies it as a HR sensor, Wahoo utility is able to catch it properly.
      In the long term BLE will win but it will take its time. Vendors have to agree first in a standard way to broadcast data.

    • Sébastien

      Except my phone had one drawback: very bad battery life, and I have a small battery strapped to the frame for that purpose. So the usb port is already busy.

      Anyway, power meter mess aside, I’m very happy with this setup. My point was that I expected it to work properly when it’s advertised as such. But in reality it’s a complete mess.

      However all this is probably a thing of the past, as I just received my new phone and noticed (I didn’t think to check before) that it has an ant+ chip :) No ride yet but I was able to pair the power meter to strava via ant+.

  64. Deepak Rao


    Couple of questions.

    1. Been following on CT and earlier they said that the stock was expected end October, now it says end Nov. Is it that they got stocks and sold out? Or is it a further delay?

    2. Has the crank arm issue with the wahoo head units been sorted out?

    • The timelines shown on the site are for new orders. I know units are coming in and going out constantly. Do you have an order in already? And if so – what’s the date?

      I haven’t checked on the Wahoo crank arm settings. I can dig around.

    • Deepak Rao

      Hi Ray,

      Thanks for the update.

      No, I dont have an order in, as I live in India. I was hoping to order it when in stock, to co incide with my wife’s or my trip to the US.

      Maybe I should put in an order and leave it in the US till our next trip :-(

    • Yeah, I suspect they’ll catch-up soonish, but at the same time an astounding number of people are ordering the units and those then recommend it to other people and so it continues to grow. So in most cases the wait is only a week or two for most new orders and it’s mostly been that way since August or early September.

      Note that CT can ship overseas ($29 flat rate), though I’m not sure what customs/import type stuff looks like for you.

    • Deepak Rao

      Customs is currently 73%. Absurd.

    • Deepak Rao

      Hi Ray,

      Ordered from CT an hour after your blog about the sale went up :-)


  65. Philippe Leduc

    Thanks Ray, great review. I used your code and bought it 10% off from Clevertraining… can’t beat that.

  66. Tosin M. Akinmusuru

    Just put in my CT VIP order for the Assioma. Really looking forward to using it.

    If I’m on zwift, Ant+ will work, but would I be able to use the Bluetooth for the Assioma, and Ant+ for the trainer?

    • On Zwift, you can use BLE, but as of right now I believe it’s still only connecting to one side or the other, not both. I haven’t tried it in the last month or so with Assioma, but that was the behavior.

      But otherwise connect to the trainer via ANT+ will work correctly (you can also as you noted connect to the pedals via ANT+ too – which gets you all the correct power).

  67. Lisa Ingarfield

    Am I remembering incorrectly–I thought the Assioma Favero pedals were $399, with the option of two sets for $699. When I go to Clever Training to look, now the duo pedals are $799. Did something change in the last few months?

  68. Justin

    Hey Ray, thanks for the great review. I have a unique question for you. I travel a lot for work (airline pilot) and want to train with power using sufferfest (iPad) on hotel gym bikes (most are life fitness). My idea is to get a pedal based system (I’m liking the Favero for the price). I would bring my own shoes, the pedals, and required to tools to remove the flat pedals, install the power meter pedals, do my work out, then remove my pedals and put the flat pedal back on. I’d be doing this about 2 times per week, and using the pedals on my road bike when at home. What are your thoughts on this? Do you foresee any issues with long term reliability of installing/removing so many times?
    Thanks, Justin

    • Definitely possible. The one thing that you’ll want to be careful of is whether or not you can actually swap out the pedals. In most cases you can, but sometimes hotel bikes do really funky things to make it hard. Or, attendants that get up in your business.

      But if you’re seeing pretty consistent bikes, then I’d have zero issues using this method. One trick I’d do though is that when you install them, just do 1-2 quick/hard efforts before hitting the zero offset button again. Just like 4-8 seconds of a sprint, that helps to ensure the pedals are settled.

      I see no long-term impacts, however, the biggest issue for any pedal based power meter these days (post-pod realm) is keeping the threads clean. Ensuring that sand/dirt don’t get in there. With a hotel gym bike, you shouldn’t have that problem. For your pedals, perhaps every once in a while just use a baby wipe or similar on the threads to ensure nothing gets in there.


    • Justin

      Thanks for the quick reply Ray. I just ordered these from CT with the DCR VIP 20% off. I’ll let you you know how the hotel bike pedal swaps work out. Thanks for a great site!

  69. Deepak Rao

    Just got this seply from Wahoo.

    Hi Deepak,

    Thank you for reaching out to us! A
    this time, with Assioma pedals, you
    cannot set the crank length,
    however it is scheduled to be
    released in a firmware update likely
    at the beginning of next year but I
    don’t have a release date for it at
    this time.


    Does this mean that You can’t use Assioma pedals coin a Wahoo head unit?

    I just ordered The pedals on the CT sale.

    • Assioma works with Wahoo, you just can’t set crank length with it. If you have 172.5mm cranks, it won’t matter, since that’s the default. But you can set crank length in the Assioma app (see screenshots above in review), which then Wahoo respects.

    • Deepak Rao

      So wahoo have officially said that Elemnt does not play well with assioma. This is from their new support page.

      The ELEMNT is able to pair with most types and brands of power meters that broadcast using standard ANT+ protocols. We have not been able to test all brands and models, but below is a partial list of known power meters that will work with your ELEMNT:

      Crank: Stages, Quark, 4iiii, SRM, Pioneer* Pedal: Powertap P1 and Vector Hub: Powertap Other: Velocomp

      *The Pioneer Power Meter transmits in two modes: ANT+ and private-ANT. You must be transmitting in ANT+ mode in order for the

  70. Deepak Rao

    Thanks Ray but this is the reply I got from Wahoo?

    Hi Deepak,

    You can use them, but at this time
    the crank length cannot be set so
    the data won’t be correct, however
    as I previously stated, this is going
    to be updated in an upcoming
    firmware update so a fix is coming.

    • Yup, that’s all correct, except they aren’t remembering that you can set it via the Favero app itself, avoiding the entire thing. Wahoo will respect anything that’s already set.

      You can see pictures of the Favero app and the crank length above in the review.

    • John

      I thought the problem was that even though the crank length can be set in the app that the Wahoo ignores this and gives an incorrect power reading if you have a crank arm that is not 172.5 mm? I can’t check this as mine is on order but can anyone confirm whether this is the case.

    • Deepak Rao

      What is the error? For example, if I run a 170 crank, and the default setting is 172.5, would the headunit show a higher or a lower power, and by how much?

    • Luke

      Hi Ray,

      Just thought I would weigh in here as I am having this exact issue. Wahoo does not respect the change if you make it in the favero app. It just overrides it and uses the default crank arm length.

      I was shattered and annoyed that this fix was not included in the most recent wahoo firmware update. Still have useless power meter pedals.


    • Luke

      Deepak, the difference is significant (see my early post for an example) and the wahoo headunit shows lower power.

    • Deepak Rao

      Thanks Luke.

      This is absurd. I just ordered a pair assuming that all would be good with Wahoo.

    • John`

      Hi Luke.

      I have the same Favero Pedals and an Elemnt head unit. After the last firmware update if you go into the companion app pairing screen there are three options for the pedals one is labelled ANT+ (then a code) and the other two labelled ‘POWER’ (which I am assuming is bluetooth). If you pair to the E and then click on the two labelled POWER then you can set the crank arm length. However I don’t have another power meter to check whether this actually makes any difference.

      I found it in a forum post for the P1 pedals (link to groups.google.com)

      Any chance you could test this and feedback the results?

    • John

      Luke. Ignore my above comment you are right there is no way to set the crank length using ANT+. I have submitted a ticket to Wahoo. I would suggest that others reading this do the same to highlight the issue.

    • I’ll check with Wahoo as to why it’s overriding it for Favero, since it keeps it for the P1 and Vector units (that was fixed years ago).

      Fwiw – the difference between 172.5 and 175 is about 1.7% I think offhand.

    • John

      Thanks Ray, very much appreciated a fix would be nice. Although I was quite surprised on how little difference it makes.

    • Luke

      My experience has been different. As I mentioned in a previous comment, the difference in readings (garmin 935 compared to the bolt) were significant. For example, average power for a 1hr ride was 129 on the garmin compared to 92 on the bolt.

      I had compared the favero’s to a powertap hub using two garmin devices and they lined up perfectly, so it is not the favero’s. It’s the bolt.

      Any idea why I am noticing such large descrepancies Ray, when it should only be 1.7%?

      Both the garmin and the wahoo are set up the same (no autopause, include zero’s in power average, etc.)

    • Can you do an overlay of the two files? That sort of difference almost always means dropouts are occurring.

      You could overlay the files in Excel after converting them, or if you’ve got the two .FIT files it’s silly easy in the DCR Analyzer: link to dcrainmaker.com

    • Deepak Rao

      The reply I got from Wahoo regarding the crank length issue. We really need more people raising tickets for this.

      Brianna G. (Wahoo Fitness Support)
      Nov 30, 8:09 AM EST

      Hi Deepak,

      I apologize for this inconvenience. This is a feature request that is on our developers’ radar, but we have not received any additional information as to when they intend to implement this support.

      I’m sorry to hear of your disappointment and I apologize for not having a more helpful solution to this issue. Please let me know if I can be of further assistance.



    • Chris

      there must be some other problem with your setup. you said you have 170mm cranks, if the bolt is assuming you have 172.5mm cranks, then it would be reporting power higher than what you are actually outputting, not lower.

      lets say you apply 100 N of force to the pedals at 100 RPM, the bolt will calculate you are generating (100N * .1725M) * 100RPM / 9.5488 = 180.7W, in reality you are creating (100N * .170M) * 100RPM / 9.5488 = 178W.

      It’s a difference of only ~ 1.5$% and in the opposite direction from what you are seeing.

      I also have 170mm cranks and Assioma pedals and a bolt so i would like the crank length feature added as well, but does anyone really know for sure that the bolt is not respecting the crank length setting in the app ?

    • Chris

      So I just tested changing the crank length setting in the app while the Assioma are connected with the bolt over Ant+, and the power output responds immediately to the new crank length setting. So it seems to me, there is no issue, you can use the app to set the correct crank length for the bolt.

    • Deepak Rao

      Wow. Thanks. That’s a relief.

    • Daniel

      Hi Luke, you are right!
      I have the exact same issue – the problem is the calculation of the average power – the other numbers are correct.
      The problem is absolutely sure located in the Elemnt, not in the pedals. If i use my Favero pedals with my Garmin Edge 1000 everything is fine, also the average power – with the bolt i get similar numbers like you. Very annoying!
      I am already in contact with Wahoo for a longer time – they are working on a fix, hopefully!

    • Daniel

      what i can`t understand is why is the shown average power in strava correct?

    • John

      Yes I have noticed the same problem and I proved it by sending some ride data with the average calculated from the Wahoo and another source. They got back to me and stated that it is a bug and are looking into and it should be rectified in a firmware update at some point.

      Strangely other power metrics seem fine and it is really normalised/weighted power which is the most accurate anyway and this seems to broadly correspond. However it hopefully something they will get sorted at some point in the not too distant future.

    • Michal

      Why wouldn’t it? Strava calculates power by itself from provided ride file. And data in file is correct. The only thing off is for some reason average power calculated by and displayed on Elemnt.

    • Luke

      Hi Chris and Ray,

      Yes it seems the problem is that average power is miscalculated/displayed on the bolt, rather than it being a crank length issue. Anyone get a time frame for a fix with this from wahoo?


    • Folkert

      Just to be clear, so there isn’t a crank length problem with the bolt anymore? As in, what would I need to do to get the correct values on the bolt? Is there some one time trick or any is the bolt indeed overwritting the crank length as someone suggested?

      I recently send back my Powerbeats due to accuracy issues which could not seem to be resolved, I would hate to order a pair of Assioma’s only to get frustrated and angry with yet another set of issues.

    • Luke

      From my understanding and experience, there is no way to get correct average values on the bolt (e.g. Average power, lap power, etc.) – real time and data file seems accurate though. But this is not due to crank arm length. Can others confirm?

    • Deepak Rao

      I need to know this too, though a bit late in the day as my pedals got delivered last week [to my daughter, I am yet to get them].

      SoLuke, at least the file when loaded to say Todays Plan etc will have correct values? Not that that is much help.

    • John

      Guys, as I see it the Assimoa are great, I’ve had mine for over a month. They are hassle free and are doing what they are supposed to (spit out accurate power data). You can alter the crank length by using the smartphone app. Even better if you buy and fit the Look Keo Grip cleats.

      My recording of a few indoor rides and comparing the data captured in Strava and the Wahoo companion app show that the Elemnt is not calculating total ride average watts correctly. From Ray’s analysis in the review the power sent out by the pedals is accurate.

      This may be a problem with all power meters and the Elemnt (I can’t verify this as I only have the Assimoa). I have informed Wahoo and they say this will be fixed – but there is no timescale as when it will be completed.

      Hope this helps.

    • Folkert

      The average accuracy thingy isn’t that the zero issue that was addressed in the last patch? Basically the elemnt included 0 values in the average where other computers and strava strip those out?

      So the elemnt does not ‘overwrite’ the cranklength? (As I have 175mm it would actually affect me)

    • Chris

      It absolutely does not overwrite the crank length setting, I tested it personally and the crank length value in the Assioma app is used and affects the power output as expected.

      There is still an issue with the avg power calculation.

    • Jon

      No it not the zeros. I tried a couple of rides without stopping and verified no zeros in the data and it’s still incorrect.

    • John

      No it not the zeros. I tried a couple of rides without stopping and verified no zeros in the data and it’s still incorrect.

    • Deepak Rao

      So, Avg power is affected. I presume this will be across the board? For lap, full ride etc?

      Couple of questions:

      1. Is the normalised power for lap/ride etc accurate on the headunit while riding? I could live with that till a fix is out.

      2. Is the avg power that is shown in say Todays Plan, after the ride, accurate?

    • Luke

      Yes, average power effected across the board.

      Haven’t looked at normalised power for lap but will check it out.

      I use trainingpeaks (not todays plan) and the uploaded averages from the bolt are still incorrect.

      Ray, maybe you should include something about this in your review, for poor unsuspecting wahoo users like me that rely on average lap/stage power during rides.

    • Deepak Rao

      Reply from Wahoo

      Chris D (Wahoo Fitness Support)

      Dec 21, 11:39 AM EST


      Unfortunately I found the issue you are writing about in our system. As with the crank arm length, the developers are currently working on that issue as well. You ticket as been connected to this issue, which will help escalate the issue with the developers. I cannot give you an estimated time on when this issue might be updated.

      Deepak Rao
      Deepak Rao

      Dec 21, 8:42 AM EST


      Avg power never reflects correctly, either on the Elemnt, or on the file uploaded to Today’s Plan or Training Peaks.

      I am not the only one. Lots of complaints on the thread at DCRainmakers review.

      Check here:

      link to dcrainmaker.com

    • Deepak Rao

      Did my first ride with them, and the avg power on the head unit is inaccurate, but the uploaded file is right.

    • Daniel

      Since yesterday a new update for the bolt and the app is available!
      Anyone already tested it with the assioma’s and checked if the problem with the wrong averages in power has been fixed?


    • Deepak Rao

      That, and the avg cadence, which is also never correct. Hope these have been fixed.

    • Luke

      averages not fixed unfortuantely

    • Luke

      averages not fixed unfortunately

    • Deepak Rao

      Maybe all of us should post on thier FB [age. I did, and also sent a message to the CEO/founder Chip Hawkins.

      This is his FB page

      link to facebook.com

  71. Are Favero Assioma pedals built with needle bearings?

    Is this a difference from Vector 3 that are using needle bearings?

  72. Eric

    Hey Ray,

    Thanks for this post. I am curious about avoiding the need for a head unit with the Assioma Duo, and using something like the Garmin FR935 for calibration and data capture. As I understand it, the Assioma app can’t calibrate the pedals? Do you know if the 935 can calibrate the pedals?


  73. Gnomen

    Where can I download the original data sets?

    • Each data set linked to in the accuracy section (that goes to Analyzer.dcrainmaker.com), then contains a link at the end of that page that allows you to download that specific set (.FIT files).

  74. konstantinos

    Hi Ray, i was thinking to get those, but i got some issues with bepros so i’m afraid to go for them. I got a balance issue with bepros. Its the 4th time they changed my pods and still balance shows like that:
    11/16/2017 52/48
    11/17/2017 54/46
    11/18/2017 52/48
    11/19/2017 50/50
    11/21/2017 45/55
    11/22/2017 53/47
    (No change anything on the bike, doing zero offset in every ride after 20minutes.)
    Is that normal? Does they fix it in Assioma, cause i was thinking to get them.

    • Michal

      Only 11/21/2017 looks a bit out of place. The rest is ok. Were those rides comparable? I mean you may observe quite big differences in leg balance depending on training intensities, type of the training, type of terrain etc. Even training (and non-bike activities) which took place the day before may have significant impact on leg balance of your next ride(s) (one leg may be more fatigued or slightly injured etc, fatigue of other muscles can throw the balance off too.).

  75. Daniel

    Hi, can you tell me how i can “put the pedals into a sleep mode while travelling” as you mentioned in your review?
    I can’t find an option for this.


  76. YianiKani

    Hi, leaving some comments/thoughts on the Favero Assioma Duo pedals I purchased beg. of October, as a thank you for the review above that helped me a lot to decide! Done 1000km+ so far on them. Installation is very easy, as is swapping them between bikes. I travelled with them, used them in temperatures ranging from 0 to about 30’C (UK, Greece, Majorca), no problems so far. Battery life was one of my concerns reading about not being able to shut them down. I only charged them twice so far, battery last ages and is definitely not an issue. Even after a flight the battery was ok (not drained, not on all the time). Battery level can be checked via the mobile app.
    The only minor issue are the cleats (as many others have said). The ones that come with the powermeter are slippery. I would say if there was a place to keep costs down for Favero, that was the right one. The cleats can be easily replaced by ‘look’ branded ones, and had the grip ones installed. Very happy since then, no issue at all. Small bit of advice, as I am a little bit of a cleat destroyer myself, use the look cleat covers and they will last for ages! Sure, it does look funny putting them on and taking them off, but I used to go through pairs of Schimano every couple of months before.
    Very happy with this powermeter so far, and a great boost to training (I know what type of training I am doing every time now, much more accurate than heart rate and speed averages!)

  77. Fray C

    The Assioma’s do everything I want and are certainly at the right price point, I’d love to buy a set as I prefer their construction to its rivals HOWEVER……

    When paying this amount of cash for a training tool I like the comfort of being able to take it to a local reputable store (should there be any problems). I’m currently waiting on a pre ordered Garmin set of pedals from Evans. The idea of buying direct, or from an online distributor just doesn’t sit comfortably with me when paying this amount and that was my sole reason in the end for choosing (and waiting a long time) for the vectors.

  78. Mark

    Hi Ray,

    I’d like to support you, but alas Clever Training, after more than a year since you made that comment (link: link to dcrainmaker.com), still don’t accept Paypal as a payment option. Pitty.

    Also, they had no European Black Friday sale. I don’t want to sound entitled, but are we some kind of 2nd category citizen to them?

    • Hi Mark-

      I appreciate the support, I really do!

      I’ll find out why they don’t accept Paypal, not sure what changed.

      As for Black Friday, in short – it’s different in Europe. Within the US everything is price controlled, and as such, deals are basically subsidized by the manufacturer in this space. Garmin, GoPro, everyone. Also, they don’t allow listing below said price either.

      When it comes to Europe, you get the 10% off deal all year round, which US folks generally don’t get on things like Garmin/GoPro etc (because of price issues).

      For virtually all the sales we’ve seen on Black Friday this year in Europe on sports tech, they are:

      A) Amazon going below cost in hopes you buy other stuff (which usually works), mostly wearable focused
      B) Deals that aren’t any better than 10% off anyway.
      C) Other cycling retailers discounting things like clothing with high margins in hopes you buy other stuff.

      As far as Assioma goes – I don’t think there’s anywhere that you can get it cheaper and actually get it (meaning, not months-long lead times). But I may be wrong.

      Now, don’t get me wrong – as a consumer I’d deal shop too – not blaming you. But just providing some detail.

    • Mark

      Thanks for your through answer, I can get behind your reasoning and now understand what’s going on behind the scenes. Please note that I didn’t expect a deal on the Assioma, as I am aware that they are a relatively new product. As a side note, I found the European Black Friday deals overall to be pretty lackluster. This goes with what you stated above.

      720 Euros with the 10% discount code for the Assioma is a brilliant deal. CT’s FAQ actually states that they support Paypal as a payment method, but when checking out it becomes apparent, that they don’t.

      I emailed CT about that, but they haven’t got back to me :(

  79. Willem

    This is weird, I own a wahoo bolt and assioma uno but do not get the option to do a zero offset?

    I do get the option to set crank lenght (BT only) and wheel circumference.

  80. phil

    i started using the assioma pedals together with a lezyne super gps bike computer. the computer has a “calibration” and “zero offset” function. calibration works fine, the pedals are paired and data is displayed. the zero offest function always comes up “failed”. now since i notice a huge 60W gap comparing the assioma data (240W) to my tacxsatori smart/zwift data (300W) i wonder whether the pedals are displaying correctly.

    i know that zwift is calculating power and not measuring it, still a difference that big seems strange.

    so what scenario am i looking at?
    a) calibration with the computer is enough (dont worry about the failed auto zero) and assioma pedals are displaying correctly
    b) failed auto zero causes the pedals to show too low power
    c) zpower is way off always. 60W difference is common.
    d) something else?

    any help is greatly appreciated

    • phil

      ok. so i bought a used garmin 800 to double check and see if the lezyne super gps is displaying correctly. in short, it does. both garmin and lezyne display the same watts. i still dont understand why the lezyne has a calibration and an auto zero function (which doesnt work) but so be it.

      i must say that favero support was very forthcoming and involved in helping me out with my questions.

      zwift support on the other hand was very disappointing. they didnt adress the 20% wattage difference in a meaningful way. they didnt acknowledge their power curve is really way off. why zwift is always displaying higher watts than powermeters (there are loads of user comments about exactly that) is anyones guess.

      anyhow, i’m pleased with the assioma pedals. i ride almost daily and have had no issues whatsoever.

      thx to dcr for the comprehensive reviews. they were critical to me deciding what to buy.

      happy new year :-)

  81. Jordi

    Hi everyone!
    I ordered this power nine days ago at CleverTraining and it is still “processing”. I sent two mails to them asking about the delivery date and I have no answer yet.
    Has anybody bought this pedals on this web and is having the same problem? Any information on this?
    Thank you!

    • Olivier

      Hi Jordi,

      I ordered my Assioma’s on nov. 12th, during the big VIP sale and just got them this thursday. They sent emails about shipping delays because they got so many orders during the november sale. They will arrive at some point and when they do, you’ll be happy.


    • The Clever Training folks are already looking into what’s going on with what you aren’t receiving e-mails (it’s a weekend, but they’re already digging).

      That said, when you purchased it would have listed an estimated ship timeframe (either immediately, or with a backorder status). That would also vary on whether you were Clever Training US or Europe (UK), as they are fulfilled from different buckets.

      Either way, hope to have an answer to you shortly.

    • Jordi

      Thank you for your answers guys!

      I’m from Spain, so I did the order to Clever Training UK. Nowadays, the say on the web “Early December” as an estimate delivery date, but I believe the information was “Late November” by the time I purchased the pedals, but not sure… I’ll wait for some more information from CleverTraining!
      Anyway, thanks for your quick answer.

  82. Peter Huys


    I’ve just bought a the Favero Assioma DUO pedals to replace my sRival Leftonly Stages powermeter.
    With the stages I have water issues and weekly battery issues so I was fedup with them.

    Today I did my first ride indoors, recorded the Stages, Kickr Snap and of course the Favero pedals.
    To my big surpise the Favero pedals where showing about 15% less power then my Stages & Snap.
    I don’t care about the Snap because that power isn’t that accurate but both Stages & Favero claim 2%.
    If both are just 2% wrong that adds up to 4% but when comparing them during the ride the difference was more close to 15%.

    What’s going on?
    Favero is wrong, Stages is wrong or both are just wrong?
    I calibrated all the devices before I started recording.

    Anyone who has similar issues, numbers?

    I know they will never be the same but 15% difference?

    • Herokey

      Hi Peter,

      I’ve bought DUO and started using with Kickr Snap when doing indoor training.
      My Snap reads the power about 5% higher than Assioma.

      I do zero offset for DUO before riding and spindown calibration for Snap after 10 mins spinning. Spindown time is around 12 – 13 sec.

      I found that Snap shows the power way off if it goes beyond 320 Watts.
      If the power is around 200W both read similar number.

      For my case I don’t think Assioma’s power measurement is wrong.
      If I look at the power balance, it shows like 49-51, no big difference in power application.

      If one side reads the power much bigger than the other, you may think something wrong with one.
      But if both measure similar amount of power, cannot think I could hardly think both are equally wrong.

      One thing, did you install the pedals with enough tightness (which is between 35 – 40nm as far as I remember)?
      If it was too loose, the sensor may read lower power.

    • Peter Huys

      Hi Herokey,

      I know that the SNAP power isn’t to be trusted but I only used it as a comparison tool.
      The last couple of days I did some other test and I think my stages is just giving too high numbers.
      Below another test Stages – Favero. Starting at 80 watts, increase every 3 minutes with 40 watts. The difference is huge.

      On thursday I’m doing a FTP test on my own bike but with the power controlled by an ergomter. At that time I’ll compared the numbers and my guess is that they will be almost the same.

      I think my Stages is just fucked up and probaly always overrated my power.
      A bit painfull (especially on Zwift) but for my outside performance the numbers don’t change anything.

      Anyway I also calibrated/zero offeset my Stages & Favero at the beginning of a ride and the Torc is also good.

      I’ll let you know how it went on thursday evening.

  83. Ade Hughes

    Left pedal completely died. Tried recharging both just in case but didn’t even light up when the charger was connected (right one was fine). So I’ve sent them back for a warranty replacement – guess I will find out how good after sales support is

  84. Zac

    What works and doesn’t work with a Wahoo Bolt and these pedals? I ordered the pedals and already have the Bolt. Can I get 3s average as I ride? What will I see as I ride? Will I get instantaneous power? I can’t even find that setting on my Bolt.

    I ordered the Uno, but already decided to switch to the Duo since they are all backordered anyway and I was planning to upgrade in the future. Why wait?

    And is Wahoo good with updates? I’ve seen one downloaded, and maybe there were others as well that I didn’t see. The combo of the Bolt with the Assioma looks to be an awesome setup, but only if it works.

    • Ade Hughes

      Yes you can get 3s average as you ride (or instantaneous or 10s or more options than you could possibly use on one screen). If you read Ray’s review of the Bolt I recall he lists all of the options

    • Zac

      But are all of these settings working? The thread above indicates they are not. I may as well cancel the order if they are not since I have a Bolt and none of the averages are correct. I know an update will be coming “real soon now”.

      And how would I set it for instantaneous power? I just don’t see a setting that is just “Power”, in watts. All of the settings seem to rely on an average, and that isn’t working. I’ve seen it on screens in the videos but I don’t have that on my phone app.

    • Ade Hughes

      Power (vs Workout Average) – that gives you instantaneous power, in watts and a small up or down arrow which indicates whether you are above or below the workout average. It doesn’t rely on average. But you are right in that there is a bug in the calculation of average power. Normalised power is correct and is arguably a more usable value. However, if you upload your ride to ridewithgps (which is free) the site re-calculates the average power correctly.

    • Michal

      The only thing that currently is not working properly is displaying workout average power. All the others metrics are fine and functional (instantaneous power, 3s power, normalized power etc.). Your average power will be recalulated correctly when you upload to Strava anyway (values recorded in file are correct).

      @Zac, There are two variants of instantaneous power field in ELEMNT (called “power (vs lap avg)” and “power (vs workout avg)”) .

    • Zac

      Thank you both. Without already having a power meter you can’t see how this works! And thanks for the assurance about reading power during the ride. I already use RidewithGPS for my tracking and routes so this will all fit in nicely.

      And it does work with Zwift and The Sufferfest, so I’m good there.

      And as I said, “Real soon now”, the developers mantra. ;)

    • Deepak Rao

      NP is of more value only for long intervals/laps or the full ride. For short intervals the avg power is what is more important, and I find that Wahoo not rectifying this pretty aggravating. Surely can’t be a big issue to fix.

    • Zac

      I’m hoping that by the time I’m ready to do workouts outdoors again, this’ll be fixed. In the meantime it won’t affect my indoor riding as I’m looking at the Zwift screen with its metrics, not the bike computer. In any case, as long as I can get instantaneous power it’ll be OK.

      I’m not training for anything, except I just signed up for the Tour of Sufferlandria, so anything I learn from this will just be icing on the cake. Maybe it’ll teach me how to reserve power to go longer, or sprint, or climb, or just show me how to stay just below FTP. I’ve always just gone on feel, and have a few zones on my regular rides where I go for speed.

  85. Deepak Rao

    Hi guys,

    Anyone tried the power ‘adjustment’ in the app? Does it work well? My Assiomas show about 2.5% lower than my powertap, and I would like to have them giving similar numbers. Going to try it on tomorrows ride, but would like to have feedback from others who might have tried this feature.

    • Folkert

      I am curious how your adjustment in the app thing worked out for you Deepak, I’m considering doing the same as my Direto is giving me slightly different numbers and my right is constantly 2% higher than my left. (My Father actually has the same problem but more extremely, like 5-8% difference between his Left & Right. I have the same difference when riding his pair so it’s defo in the units. Told him to contact support or use the app but afaik he’s been a bit lazy about it. Anyone else experience similar issues?).

      I’d like my Assioma’s to match my Direto so that I can just use the Direto in zwift and rely on the data compared to the assioma’s when trying to pace myself.

    • Deepak Rao

      Hi Folkert,

      My Powertap was reporting about 2% higher than my Assiomas. Consistently. It is within the acceptable range too, if you take into account each having an accuracy of say, 1.5%.

      Having said that, I wanted numbers to be similar, so I started by setting the Assiomas to +2%, but then the Assiomas reported higher.

      Trial and error for about 3 rides, and a setting of +.4% makes the numbers to within 1 watt on every interval as well as a full ride.

      What I did learn was that, when you make a setting, there is no point in just trying it for 3-5 minutes. Better to do a hour or so before changing it.

    • Deepak Rao

      Hi Folkert,

      I see now that you are talking about a left/right imbalance? I have that too. Easy riding it goes up to almost 60/40, but on hard intervals/rides, it evens out to 55/45 or so.

      I dont think that you should be correcting that, unless you are sure that the unit has issues. Maybe both of you have an imbalance?

      Try on another pedal if possible? Are you saying that you have a 2% difference on your pedals and 8% on his?

    • Folkert

      Hey Deepak,

      Thanks for the info on the adjustments in the Assioma’s, did another zwift race yesterday so going to compare that data.

      As for the imbalance issues when I rode my dads bike on his Assioma’s I also had a 45/55 L/R issue. As for on my bike with my Assioma’s I have 49/51 (which is fine imo), the 49/51 also matches up with the Powerbeats I had before when the functioned properly (I send these back because one ride would be 50/50 or 49/50 and then the next would be 41/59 or some silly numbers like that).

      So I strongly believe one of my dads units is bust (I think it’s the left one when comparing the data to his Direto if you double the right unit you end up at or close to the Diretos numbers).

      I did offer him to ride my bike and see how his balance is there but he has yet to take me up on that :-)

    • Folkert

      For those interested my race yesterday Direto & Assioma’s data;

      link to analyze.dcrainmaker.com

      I’d say the difference for me is a bit more than 2% which I guess can happen, 2% on the Direto (let’s say up) and 2% on the assioma’s (let’s say down) gives a max difference of 4% or something.

      I’ll fiddle around with it a bit over the next days.

      Ow ‘important’ to note, I did a calibration on the direto before riding (it’s between 2359 and 2361 normally, it moved from 2359 which it had be the last two weeks to 2360 this time). I then did a warm up ride of ~45 minutes with a few intervals after which I did a ‘set zero’ on the Assioma’s to make sure the data was as clean as I could get it (I think).

    • Pro Tip: On the Analyzer at the bottom is the mean-max graph, which makes it easy to see the differences across the range of wattages. In your case, at least it’s consistently off…

    • Folkert

      Hey Ray,

      Thanks, ye I found that graph very useful to see the difference :-) I’ll fiddle around and try and get it to match the Direto as I believe this to be the more accurate of the two meters plus I’ve been using the Direto’s numbers for a few months now in Zwift to get an idea of how hard I’m pushing etc.

      Have you heard about any Left/Right issues with some units as the ‘problems’ my dad might be experiencing? Where a unit is simply defective? We added some extra spacers to make sure we’re all good, checked the distance between the shoes and the Comp units etc.

    • Jorge Sousa

      Just to add something. What you are observing is described here by the “power gurus”,
      link to cyclist.co.uk

      ‘Most people have a “lazy leg”,’ he says. ‘When riding along at recovery or endurance pace there’s one leg that doesn’t do as much work as the other. It’s subconscious – it just happens.

      ‘As you approach your FTP [functional threshold power] that lazy leg starts to add more and more to the gross power and the balance moves towards 50/50 because that lazy leg is coming into it, but at maximum effort it can swing back to 47/53 or worse as the dominant leg takes over again.’

      Its an interesting read…

  86. Zac

    One more issue just came to my attention, but maybe this is already fixed. On the Zwift website, at the bottom of the page where it lists trainers that it supports, is an entry that says “Favero Assioma Uno and Duo – Requires code to artificially double power reading.” Is this still true? I’m not sure how up to date this is.

  87. Amy Baldwin-Granger

    Thank you for such a thorough review! I am in the process of getting mine set up, I have gone through everything except for attaching to crank and calibrating/zero offset. My concern is the battery. When I detatch from the chargers, the LEDs continue to blink every three seconds even when not being moved/used. Is this normal? I’m concerned that the battery is being used when they are not “in action”. Is there something I’m missing that would put them to sleep? Should I keep them plugged in to chargers until I’m ready to ride? Thank you. :)

    • D

      Be sure that ur apps are closed after u finished using them. Otherwise pedals can stay still connected to ur phone or comp. When they are not in use they are in sleep mode, and not blinking at all….

    • Deepak Rao

      Even if the app is open [the head unit, or the Wahoo phone app] my pedals go to sleep after 5 minutes or so. Not sure how it is with the Assioma app.

  88. Amy Baldwin-Granger

    Another newbie question – I plan to use these on my TT and road bikes. Both bikes have 165 crank length but wheel size is different (650c on TT, 700c on road bike). Will the wheel difference cause problems with power data? Thanks!

  89. Gaz Bowman

    Hi, Love our reviews first of all!! I’ve just got my assioma duo pedals. I’m trying to pair them to my garmin 810 but it’s saying multiple power meters found and then won’t let me pair them! Did you have this problem? Are they compatible as the duo with the 810? I’ve done a lot of googling but can’t find an answer. Cheers

  90. Hi Ray,

    I’m interested in these pedals. But I have a couple question that I hope you have time for.
    1) I have a Kinetic Rock and Roll Smart Control but I’d like to connect the pedals to the Zwift for reading watts, and have the game control the trainer for resistance. Perhaps that means I should connect the trainer directly to my Mac Mini using Bluetooth (as I have been doing), but then select the pedals as the power source in Zwift. And the pedals would be connected to my Mac Mini via an Ant+ dongle with a long cord so it can be closer to pedals. Only I’m not sure if that will work since it would require Zwift to use both Bluetooth and Ant+ at the same time. So Perhaps I need to use ZML instead? I’m wondering if there is an approach that will work and will read power from both pedals (so not Bluetooth I suppose). Also wondering if is there an Ant+ dongle you would recommend for Macs if I need it.
    2) I haven’t used road pedals in years (I’ve been using SPD MTB pedals on my road bikes). Are there cleats that are more grippy/less slippery for walking in that are compatible with these pedals?
    3) I’d also like to try connecting the pedals to my Garmin Edge 810 and recording a few sessions on that so I can compare watts to the power readings on my Kinetic Rock and Roll Smart Control connected to Zwift running on my Mac Mini via Bluetooth. Any thoughts on how to set this up?

    Thanks a lot for any help and suggestions you can provide.

    • Ernesider

      “Are there cleats that are more grippy/less slippery for walking in that are compatible with these pedals?”

      There is quite a bit of discussion on the suitability of Look Keo Grip cleats if you check earlier posts ..!!

  91. Zoltan H.


    It is not 100% clear for me what will be the difference if I use vector 3 vs Assioma (both dual) with a Garmin edge 1030.

    I started to read something about Garmin cycling dynamics, which used to be allowed only for Garmin vector pedals, but not any longer as since 2017 November this is available for other manufacturers too.
    As far as I understand Garmin vector 3 is able to suggest the right place of the cleats.
    Opening the Garmin cycling dynamics for the public means Assioma is also able to provide the same data?
    Eg connecting assioma duo with Garmin edge 1030 will be able to provide the same data than the vector 3?
    Or Garmin vector pedals have more sensors so this is a specific feature?

    Thanks for the information.


    Hello any issue with shoe cover rubbing the pod in winter !! because here impossible to ride without them during the bloody winter.


    Hello another problem when i try to calibrate my pedals with my LEZYNE SUPER GPS YEAR 9 it said , failed all the time , anyone as an idea? No other ANT+ device on the bike only the pedals.
    Please help

    • Dim B

      Hey Ray

      i own a set of Assioma Duo and i swaped from 520 to Wahoo EL Bolt,

      i noticed that after the ride that the Avg Power content of the bolt was way lower that it was supposed, also the Avg Cad was lower

      while the Avg 3min power works perfectly and the Cadence, after uploading the ride to Strava and TP
      they looked normal.

      do we have an update for this yet ?

    • LOPEZ

      Hello i finally swap the Lezyne for a Garmin 520 everithing is easier. Calibration included.

    • Mandy

      Hi, I recently purchased the Assioma duo & have a Wahoo Bolt head unit. I fell accros this issue on here link to bikeforums.net but can’t find any info as to whether it has been rectified? Are you aware? Thanks in advance.

  94. Ernesider

    PowerMeter24 gave a 10% discount on a price of £702, promising delivery in 10-20 ‘work days’ and they pocked the money right away, it will be 18 tomorrow. I emailed them a few days ago and got a rather vague reply yesterday about supplies arriving at middle or end of month. My Stages seems to returning consistent figures after ‘a monthor so on the sick’ and I have thought of cancelling, but most comments are positive, so will patiently wait.

  95. Joost

    Just starting riding with my Assioma Duo’s in combination with a Polar V650. Installation and calibration super easy, seems to be working perfectly together!

    • Scott W

      Does everything show correctly for you Joost? If so, how did you set it up as I’m currently seeing incorrect values and a huge discrepancy with the L/R ratio.

  96. Just received the pedals and I’m happy overall with only one drawback.
    Is there any way to stop them from blinking every 3 or 4 pedal strokes? I only use them on the indoor trainer and it is a bit annoying and totally useless (in my own opinion).

  97. Deepak Rao

    Well, just touched 50 hours with the pedals, and this is what is left from the first charge. Not bad. They have also been thru a couple of long flights. Any idea how to make sure that they don’t come on during travel? I remember reading it somewhere but cannot locate it.

  98. Jeff G

    I just received a pair of the Assioma Duo and having some connectivity issues with a Garmin Edge 500 computer. The pedals are activated and connected to the Garmin; however, when I attempt a calibration, it says “Calibrating…” up top and then below is a box with 6 dashes like this “——“. It stays on that screen and never completes a calibration. Took the bike for a test ride and the pedals are sending power and cadence data to the Garmin, but I’m concerned about not being able to perform a calibration. Has anyone had this issue with a Garmin Edge 500? Is the data from the pedals reliable if I’m never able to calibrate? Thanks in advance.

    • Ernesider

      Going on my limited experience, calibration is all important. I tested the Assioma Duo pedals with some intervals against Wahoo KickR on Saturday and the numbers were all over the place on the warm up until I calibrated the pedals. Then they matched up pretty exactly …!!

  99. No problems for me during the calibration with a Garmin Edge 820.

  100. Zac Fisher

    Do people find the release mechanism very stiff? I just started using them on my trainer and have to press hard to get in, and give a good twist to get out. I’ve adjusted the screw as far as it goes. Also, I can only twist my heel outward to release whereas my Keos I could go either way, and as far as I can remember that was the case with my original Delta pedals from way back. Of course, my habit is to twist inward. I’m afraid I’ll have to rejoin club tombé.

    • Deepak Rao

      Yes, even at its loosest, I find it harder to clip out than my Keos. The Powertap P1s which I used for a while were the easiest of the three. Having said that, not been much of an issue for me.

    • Michael Swann

      I too had to adjust my unclip technique so I turned my heel out and not in.

      The release tension has been my biggest bugbear with these pedals since I bought them 6 months ago. I just adjusted them to be looser, so they should be a lot better.

      What I found was that past a certain point, you don’t feel any indents as you turn the adjustment and the bolt will screw out of the pedal. All that you need to do then is push the bolt or adjustment indicator back up and it will be good. Make sure both sides are adjusted the same (I used Verniers).

      It will be a couple of days before I can ride with them again, but hopefully I will not have that feeling of impending doom when I come to try to unclip at a stop.

    • North Krimsly

      Michael Swann and others,

      I also thought the release tension on the pedals is too high. I adjusted the tension screws all the way out, and discovered as you did that past a certain point, the bolt stops moving the metal tension indicator anymore and just screws out of the pedal. But, the metal tension indicator looks as if it could move further in its slot (and reduce tension even more).

      I’m trying to understand your post — were you able to reduce the tension further than this? If so can you please elaborate more? When I ran out of the bolt’s ability to move the metal tension indicator, I just screwed the bolt back in a little. But I’m hoping you figured out a way to reduce the tension even further.

      I’m using Look Keo red 9 degree “grip” cleats, rather than the cleats that came with the pedals.

    • Michael Swann

      I found what you did: past a certain point the indicator stopped moving and the bolt started coming out of the pedal body. I found that the bolt simply needed to be pushed back in.

      Clipping in and out should bring the bolt back in again, but I just pushed it using the hex key I adjusted it with.

      My release tension is noticeably less than it used to be.

    • Zac Fisher

      After almost 2 weeks of having them I finally had a chance to ride outside rather than on the trainer. In those 2 weeks I made it a point to NOT think about unclipping and of course did it wrong every time. When I did take it outside I was so worried about it that it wasn’t a problem at all. I’ve always been in the habit of unclipping before intersections anyway, and maybe the time on the trainer loosened them up a bit. I rode into the park where there are no intersections and practiced a bunch too. Having power riding outside will be a great addition.

  101. Mandy

    Hi, I recently purchased the Assioma duo & have a Wahoo Bolt head unit. I fell accros this issue on here link to bikeforums.net & then on this feed above but I can’t find any info as to whether it has been rectified? I can’t see anything on the Wahoo site or Facebook page. Is anyone aware if it has been fixed?

    • Luke

      not fixed.
      bane of my existence.

    • Deepak Rao

      Not fixed, and not sure when. Pretty pissed, as I got my entire family switched from Garmin to Wahoo, bought 2 Kickrs and was happy till wife and I switched from powertap hubs to the Assiomas.

    • Mandy

      Thanks, I guess the only way to get updated is to message them directly. I’ll be using them on the turbo only for about another month but I hope they get it sorted soon for when I venture outside.

  102. GB

    hi Ray,
    last nov, I bought the Assioma UNO (using your link) and I just upgraded to a DUO this month. What should I do regarding the Bike computer to change to the DUO? I have the Wahoo bolt and after updating the system on my iphone, I deleted the assioma on the bolt and then reconnected; unfortunately it shows only the ANT+id of the left pedal… Is this normal or do I have to do anything else?
    thank you, GB

    • Mandy

      GB, only the left pedal is found on Ant+ as it is the master pedal. As long as you have linked the new R pedal to it in the Assioma app then it will be connected on the bolt. You can test by adding the L/R balance in the power field & you will see it show up there. On BLE both pedals will connect to the bolt independently. (I spent a good few hours trying to connect the R pedal in Ant+).

    • Thanks for the support GB!

      I have’t done a conversion myself, but that does sound pretty normal to be honest. The reason is the left pedal is considered the master, so behind the scenes it handles the linking.

      As long as you’re getting power balance showing properly (well, showing anything for that matter), then you’re good to go. It’s a data field I always have on all my bike computers that have dual-leg power meters, since it ensures I can quickly check if I’m getting both legs properly. If the value shows nothing, something be broke.


    • GB

      yes, that was my case… I have that field and the balance shows 100%/0… I’ll try to reset everything and reconnect once more… `I was hoping I’d have made a mistake… thank you….

    • GB

      thanks Mandy, I have that field and it’s not working… I’ll try to reset everything…

    • Ernesider

      “On BLE both pedals will connect to the bolt independently.”

      I have always understood that Bluetooth was one device to one device only so is that possible.

      I should be getting my Assioma Duo soon (was promised it this week) so have been reading up what is available on connecting the pedals to my Garmin 1000.

      I had decided that initial activation would be done using the Assioma App via BT from my iPad Mini.

      Then the data, Power Cadence etc would be transmitted from the pedals to the Garmin using Ant+, as the only method currently viable for two devices to communicate simultaneously with a third.

      Or is it possible to connect one with BT and the other with Ant+ ….?? 🤔

  103. Adrian Cartlidge


    I got these pedals after a very long wait and I’m generally happy with them.

    I just have one issue; clipping in! Its not due to the tension or the KEO cleats but rather the spin of the pedal. When I stop at traffic lights and start to pedal with my left leg and try clip in with the right I have to wait a second or two for the pedal to stop spinning like crazy.

    I compared the spin of these pedals to my dura ace pedals and when you spin a dura ace pedal It will spin one or two times before falling back into the ideal position to be clipped in. The Assioma pedals will spin 4-6 times before stopping in the ideal position to be clipped in.

    I don’t think its anything to do with the balance of the pedal but rather the grease inside. On dura ace the grease in the bearings give a Butterly smooth feel which stops the pedal from spinning rapidly. My Assioma came like this brand new. So my question is this; has anyone else experienced this? If so, has anyone tried adding more grease to the pedals?




    Hello since this morning i have the error code 99 and calibration failled with my garmin 520 after 1 month of use first problems after fully charging the pedals , someone ca help , Thanks

    • Ade Hughes

      When you spin the cranks are both pedals displaying LEDs? If not can you see both pedals in the Favero smartphone app? If both are visible are they both charged?

      I ended up with a faulty left pedal after a couple of months of use. The symptoms were that it would not display any LEDs and gave a 99 error on calibration. Needed to go back to Favero and they repaired the sensor

    • LOPEZ

      Yes they ar both visible and both charged leds are working fine. Normally Favero can see if something is wrong.

      I ll let them know.

  105. Kris

    I’ve done 5 rides with these pedals now, Duo version, in combination with the Wahoo Elemnt Bolt.
    As far as I understand it, the Average bug on the Wahoo should impact the ride summary page only, which doesn’t truly bother me as I do my analysis on Strava.
    I have had some worrying results however during a few rides, but also in the analysis of L/R Balance afterwards.

    On my first two rides, I had a fairly consistent L/R balance of 43/57%

    On my third ride, I found the power readings to be abnormally high (for me) so I stopped and did a zero offset. For the next 90 minutes, the average L/R balance is again 43/57. During the last 15 minutes of that ride, power readings about halved while I felt I was doing the same effort, and post ride analysis shows that for those 15 minutes L/R balanced shifted completed toward 0/100

    If I remember correctly, I did a new zero offset before putting the bike aside.

    The next ride, everything seems absolutly perfect, with a nice grouping of L/R balance throughout the ride, giving me confidence to actually believe the numbers of this ride.

    On the my fifth ride. Admittently, I put the pedals on a different bike without doing a zero offset. The manual does say it auto-calibrates during the first 10 or so revolutions of the crank.
    Though the numbers are consistent throughout the ride, without apparent dropouts of de Left pedal as seen on occasion the first rides, the L/R balance ends up at an average of 35/65, quite a way off of earlier numbers. And I can’t help but wonder if these number are correct and how that impacts the numbers given for actual Power output.

    Are these issues related to the Wahoo? Are these inherent for dual sided power meters? Do I need to do a zero offset for each ride. And when? Before the start, after a few minutes, multiple times throughout the ride?

    Training based on Power rather than HR is getting severely complicated if the numbers cannot be trusted with a fair degree of certainty.

    Anyone with similar experiences, either with the Wahoo and other dual sided PM’s, or the Favero Assioma Duo and other head units?

    • Michal

      You absolutely. undoubtedly must to zero offset your pedals after moving it to another bike. As a matter of fact good practice is zeroing before every ride and after warm up. Auto-calibration you’re writing about is setting installation angles of the pedals. It’s different thing. Assioma doesn’t have auto-zero function. A zero offset has to be done when unclipped from the pedals. It won’t magically zero offset itself during ride. It’s quite opposite. During first ride after new installation, doing few sprints or hard efforts may cause shift in pedal spindles position and you should zero offset it again to make sure you’re power meter is reading correctly.

  106. LOPEZ

    So looks like a lot and mor problem after a full charg of the pedals.

    Shamir Kritzler a donné son avis sur Assioma & Bepro – Favero Power Meters –
    1 étoile
    27 décembre 2017 ·

    I start to use the Assioma DOU a week ago and he worked fine at the first ride. since then, the calibration with my Garmin Edge 810 keeps failing. The calibration has failed every single time in the last few days and my rides are showing crazy power numbers (data from one of my rides: 11,524 W Max Power, 1%L/99%R balance, 94W avg. power. I can give you my Garmin connect link if you like). My Garmin 810 is always showing “Calibration Error 99”.
    I’ve sent your Technical Support all the details in the quick contact form at your site. Please advise.
    Assioma & Bepro – Favero Power Meters
    Sports et loisirs
    Photo de Assioma & Bepro – Favero Power Meters.
    Assioma & Bepro – Favero Power Meters
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    3Vous et 2 autres personnes
    Assioma & Bepro – Favero Power Meters
    Assioma & Bepro – Favero Power Meters Hello Shamir, thank you for reaching out.
    I’m sending you a private message because we need further info in order to help you:
    Thank in advance, we’ll give you the solution in the quickest way possible. …Voir plus
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    · Répondre · 7 sem · Modifié
    Endre Sharoshee
    Endre Sharoshee Dear Assioma Team, I am facing exactly with the same issue what Shamir stated above. The device is brand new, used appr 4 times, worked perfect then same issue occured. Appreciate your fast response regarding this topic, please use my private email account endre.sarosi32@gmail.com. Best regards, Endre
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    · Répondre · 6 sem
    Assioma & Bepro – Favero Power Meters a répondu · 1 réponse
    Richie Whelan
    Richie Whelan I’m facing the same problem can you pm me,it worked for one ride
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    · Répondre · 3 sem · Modifié
    Assioma & Bepro – Favero Power Meters a répondu · 1 réponse
    Emmanuel Lopez
    Emmanuel Lopez Hello Marco after fully charging my pedals for the first time , now they don t work , i have the message calibration failled eror 99 on my garmin 520 and on the App it does not finf my right pedals anymore and the dat during the ride are completely off , i need help please.
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    · Répondre · 1 j
    Assioma & Bepro – Favero Power Meters
    Assioma & Bepro – Favero Power Meters Hello Emmanuel Lopez,

    Thank you for reaching out.

    Do not worry, your request for technical support has already been taken in charge and we are glad to help.

    Please consider that my colleagues of the technical support, who you are already in contact with, do not read directly the messages on Facebook so, for our quickest and most accurate feedback to the issue detected, please refer to the email exchange.

    Generally speaking: the “99 error” message is a generic error message the bike computer gives in case of a problem of data communication; meaning that, although the error message is the same, every case remain very specific. The specific solution to the issue can only be given by examining accurately the case with all the information requested by my colleagues of the technical support.

    Have a good day,
    Andrea | Favero Electronics
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    · Répondre · 55 m

  107. Michael Wallenius


    Thanks for a GREAT article and it gets my mood up a bit after having bought a pair of Assioma Duo just two weeks ago. Due to Swedish climate during Feb I have though only used them indoors together with my trainer Tacx Genius Smart. Here is my headache.

    All over Internet you may read forum articles on people experiencing huge differences in what pedal power meters measure compared to what the indoor trainers measure when it comes to power. And I get the same results. I get a difference of 20-50 W depending on cadence and power put in to the workout. This is really frustrating and I cannot seem to get my head around the reason.

    My setup is that I perform a predefined workout with my iPad and the Tacx app. The predefined workout makes me get a power measurement as expected independent on cadence. If I increase cadence the Tacx app releases on resistance so that I keep my self in the “right” power area. I get a nice graph over my workout where I see the Tacx power measurements.

    My Assioma Duo are connected to my Garmin Edge 1030. They constantly shows a huge difference in power measurements, and we are talking about 20-50 Watt BELOW what the Tacx app is saying.

    This behavior is exactly the same if I switch from the Tacx app on my iPad to instead use Zwift for joyriding or performing a workout.

    Can you explain this difference and do you have any cure for this? According to your article the Assioma Duo have no issues what so ever with being accurate compared to other power meters, disregarding if they are indoor trainers or other pedal meters.

    Kind regards

    • Folkert

      Hey Michael,

      I had a similar problem (as did my Father) and here is what we did;

      – Make sure your trainer is calibrated properly (temperature shifts matter for the Elite Direto at least my calibration value moves a bit at times)
      – Before doing a Zero on the Assioma’s put in a good sprint effort, I do something like 800watts sprint before the Zero so all the moving parts have moved at least once. Better results might come from a longer warmup.
      – Use the Assioma APP to tune up / down the numbers. My assioma’s are on + 1,4% now and my fathers are @ +4% (but he might need to recalibrate his Direto to be honest).

      The rest depends on how accurate your trainer is, I am not sure about the Genius Smart for accuracy but this is what we did on our Direto’s.

      The fact you can + or – adjust the assioma’s in their app is truly amazing and makes it very viable to adjust the power readings to compare.

      There are pieces written on the subject but having a ‘correct’ value is not as important as having a ‘constant’ value. Basically I don’t care if i’m pushing 160watts or 200 watts as long as I get the same number @ the same effort.

      Best way to compare values by the way is using Rainmaker’s tool, here is one of my rides;

      link to analyze.dcrainmaker.com

      The most useful graph is the Mean Max Power (showing max power average over a time frame) which you can see the assioma’s now closely follow the powermeter. Realistically the Assioma’s should read slightly higher since there is no drive train loss when reading @ the pedals. For me I just want the numbers to be as close as I can get them as I mentioned before :-)

    • Michael Wallenius

      Thanks for your quick response!

      I have calibrated my trainer after 10 min warm up, which makes a huge difference after warming up the trainer and the tire, compared to making the calibration in the beginning. I have to make significant adjustments to get the calibration to be acceptable in the Tacx iPad app.

      I agree that the most important thing is to get them to show the same result. But at the same time, adjusting my pedals to an indoor trainer that might be showing an incorrect value might give me psychological effects that I don’t want to experience. :-)

      Today I have an FTP value of 310 W measured through the Tacx iPad app and the trainer connected to my Edge 1030. If I would rely on the values given by the pedals it would show my FTP as around 260-270 W, which might make me a little bit sad… :-)

      At the same time I would say that it is equally important to get the CORRECT measurement, since I am at the moment training to be able to perform according to specific targets. The targets indicates that I need an FTP value of around 270 – 300 W. If I have equipment that measure an unreliable and too high or too low FTP, all planning and performed efforts in my training might be inadequate or destroy the possibility of reaching my targets.

      I will adjust the pedals through the Assioma app and see where that takes me.

      Many thanks for your reply and insights!


    • Ernesider

      “the most important thing is to get them to show the same result.”

      I don’t see the logic in that… if you you had two odometers showing differing distances, would you adjust the one showing less to match the other without knowing which is correct.

      Anyway consistency is the important thing and you should have a very good idea of which is closest to accurate from your ability to complete workouts based on http://FTP... In Trainerroad for example ..
      I know that if I added on 10-15 to my FTP I wouldn’t get half way through some of the harder workouts never mind 20-50 😰😱

    • Michal

      Power meter absolutely should report correct power value. It’s it main purpose. You paid for power meter, measuring cycling power in Watts, not some made up number/unit generator. When you’re riding up the hill it should report power that is correct for given slope and weight (by correct I mean in agreement with laws of physics). So first of all cycling power meter should be accurate. If it’s accurate it’s also consistent.

    • Michael Wallenius

      Good comment, and in line with what I am writing in my second reply, I think. It is important that they are aligned and giving the same result, if I am just looking for improvement and that they aren’t giving me totally wrong results. But it does not hold as the only important thing if we look at it from a wider perspective.

      I am primarily using Today’s Plan for my planning and training. With my FTP given to 310 W in Today’s Plan and in my Edge I barely managed to perform my workout 2x(6(3-1)) Zone 4+, rpm 80-100 when measuring through the Tacx. It was really tough, and so it should. If I would increase it so that the Assioma’s would reach 310 W during 3 minutes, I would not make it.

      But the thing isn’t really if it is 260 W or 310 W that is my FTP. I need to have the CORRECT value AND the numbers being aligned between the trainer and the pedals, otherwise I will be in trouble when I start biking outdoors this spring. If they are aligned only, but not correct, I will perhaps do the wrong training to reach e.g. FTP targets to be able to perform in races according to other set targets.

      So I would say that the logic is there to name consistency as important, but not the only important value and I take back the statement of alignment between pedal and trainer measurement as the most important. The correctness in given value and alignment between powermeters are equally important when moving from one to the other.


    • Ernesider

      Yea – I realised the obvious flaw in my workout idea as soon as I posted..

      I am sitting waiting for DHL to deliver my Assioma Duos.
      They promised to contact me this morning and give a delivery time interval but I am now waiting four and half hours and no contact.. ordered on 23rd Dec …!!

    • Folkert


      Honestly if 260 FTP makes you sad then so be it, I wouldn’t take an FTP based on a tire based trainer personally (I find wheel slip and that sorta things way too annoying).

      For training purposes I would still argue the absolute number is not relevant, you shouldnt train based on absolutes but on relatives.

      Do an interval of 110% FTP and it’s 110% of the effort you’re doing on that same thing. What matters is that the FTP you’re calculating on is a representative effort compared to your meter. Which again, is why you should get them to match, as far as I know you cannot get the Genius tuned down, which would mean the assioma’s up.

      Realistically though (sorry Michael) I would say the Assioma’s numbers are likely to be more in the ballpark compared to the Tacx Genius but that’s going based on the fact that afaik the Genius is an older Tacx model and Assioma’s are giving a ~2% power fault rating which has been confirmed by many reviewers.

      When in doubt you could try configuring them with Weights, I could look up the exact method but I believe if you set Zero the Pedals through your Garmin, keep it in the screen and now put a 3kg weight on the pedal (I used the old bags I had from the Powerbeat) and it should show a number of 30. if it shows a lower number then your pedals might have a problem and you should contact support.

      Realistically though you’re most likely best off to trust your Assioma’s (unless you have a more accurate trainer/powermeter you use as a benchmark) to be truthful. Which means I would use their FTP results and train based on those numbers. Again using relative numbers rather than absolutes.

      Having a 310watt FTP might be ‘great’ mentally but if it’s based on bogus numbers who are you kidding? It’s a training tool used to see how much effort you’re doing and if you’re improving. In order to measure and train this you need CONSISTANT numbers.

      Just to be clear, I also believe a powermeter needs to be accurate, what the hell else are you paying for… Problem is that my Elite Direto and your Tacx Genius aren’t a powermeter as their core function, their core function is to be a trainer.

    • Michael Wallenius

      Really great discussion going on here!

      I understand your argumentation around relative numbers are more important, when talking in terms of performing a FTP based workout. But let’s say that I have set a target to perform a certain time during a certain race, and a judgement by professionals is that to do that I then need to be in the range of 270-320 Watt in terms of my FTP value. Then there is a massive difference in the planning before the race, depending on whether I think I have 310 W FTP or 270 W. I am not sad for the 270 W, if that is the correct number, but it definitely need me to rethink my planning if I need to reach 320 W FTP.

      I also believe to that the Assioma’s are the ones being most accurate… but it hurts mentally. But I will get over it… :-) I don’t want to have 310 W FTP if the numbers are bogus.

      The trainer is three or four years old. I bought it used two years ago. I agree with your comments on tire slip etc. Therefore I have been thinking that it might be time to pass the Genius on to someone else and get a direct-driven trainer instead.

      What I am trying to do here is to get the picture on which power meter is the one to base my training on. At the moment it seems as Assioma is replacing the Tacx, which will have an impact on my training effort results in Today’s Plan that I use for planning and reviewing. Up to now I have performed superbly, based on Tacx numbers. In the future I will have to work harder… :-)

    • Folkert

      Hey Michael,

      Okay, ye I see what you mean. I have the same estimate for my Marmotte coming up this year. Want gold this year so I need I believe around 4,0w/kg FTP or something like that, so having the wrong number is annoying.

      But ye, I would defo go with the assioma’s numbers for your training unless you can find a third powermeter that you trust that can act as a tiebreaker that you can borrow somehow :-)

      Goodluck with the mental ‘blow’, I’m sure you’ll cope.

    • Kris

      Good luck on the Marmotte, though I doubt you need 4W/kg
      I’ve done it in 2017 and I’m nowhere near that number.

    • Ernesider

      Assioma arrive got everything installed but right pedal wonk connect took it out for a run but only left readin Lights are flashing on right but won’t connect

    • Zac Fisher

      I used a Fluid 2 trainer with virtual power on both Zwift and the Sufferfest, and the numbers from that were over what my pedals now say. That isn’t unexpected. On a smart trainer I’d have expected more consistency, but when I read that this is an older trainer bought used, I’m not too surprised either. I would just assume the newer Assioma pedals are more accurate as I’m assuming mine are. You are still putting out way more power than I am. But I think that is part of the point. I’m training to improve my power, based on my reading, and you are training to improve yours.

      Unless you have 2 meters or more on the bike you’ll never know if they are absolutely accurate, but the review here says they are since DCRainmaker does have 2 or 3. I’ll go with it.

    • Ernesider

      Everything working now .. Had downloaded Assioma App to iPad but it would only activate the left pedal. Downloaded the App to my Moto G4 and it instantly completed the process.

      I find the pedals very tight to clip in and out…. don’t like that at all … is there any way to loosen them….??

    • Zac Fisher

      There is a screw at the back to loosen them. Mine seem to be loosening as I use them. Also, you can only unclip by twisting outward, not inward with your heel. The cleat hits the pods when you go the wrong way. I’m going to see if I can carve an old cleat so that it will clear the pod with my Dremel tool without cutting away anything essential. It would likely weaken it but may still be workable. I think I still have my old shoes with the cleats to try this.

    • Ernesider

      Thanks for the reply Zac

      I have loosened up the pedals as far as they will go and spent most of the evening trying them out and trying to get in and out of them. I had read a lot of complaints about the problem of clicking in and disengaging from the Expedia cleats, but really didn’t appreciate how bad the problem was. I wouldn’t have bought them if I had.
      Eventually I took them off and fitted a new pair of Keo Grip cleats. These are much better at getting in but getting out is still a struggle and not something one would want to do in an emergency. I am hoping they will loosen as I use them…!!

    • Michael Wallenius

      Good morning!

      I have now got some good sleep and start to mentally switch to using the Assioma pedal power meters as my reference for the future. Have an FTP measurement workout today, so will be exciting to see where I end up, compared to my former Tacx app/trainer measurements. Another change will be to move over from using the Tacx app, that still will be controlling the trainer, in a Power based workout to a Slope based workout.

      I have no issues with stepping in our out in my pedals. They feel really great in my opinion.

      Good luck to you all measurers!😄

    • Ernesider

      Have you still only used them indoors on your trainer …??🤔😏

    • LOPEZ

      Yes it is hard to unclip but at least you don t loose the pedales when sprinting.
      Me what i did find a problem is i had to change the cleat positioning because i was using them with Keo pedals and the angle of the foot was really ankles outsides and me i like it inside so if now i am cliping keo pedals my foot will rub the cranks.
      Anyone else noticed this problem.

    • Michael Wallenius

      Yes, here it is -2 degrees and snowing, so it will take a while until the roads are rideable. But I am going abroad for biking so from the 2nd of March I will have tested them outdoors as well.

      My FTP test today is consistent with earier observations even when the trainer is controlled through ”slope based instant ride” type of workout in the Tacx app on my iPad.

      I still get 50 W below the Tacx numbers when the Assioma’s are connected to the Garmin Edge. So a more reliable FTP value is today 255 W and not 305 as the Tacx FTP test would indicate. Mental blow, but I’ll get over it…

    • Fwiw: I generally wouldn’t trust the accuracy of the Genuis over Assioma.

    • Michal

      Yeah. The list of trustworthy trainers in the subject of power accuracy is rather short. Neo, Drivo, Kura and Direto are on it. Maybe Wahoo Kickr. Of course it doesn’t other trainers can’t be accurate, they sure can. For example my cheap Tacx Vortex Smart is hilariously accurate. But it’s often hit or miss with wheel-on trainers and direct drive power estimators.

    • Michael Wallenius


      Thanks for your reply and I nowadays agree, but it should definitely have to be that way. They claim to measure Watt with a pretty high accuracy…

      Today I made a ride using the Tacx iPad app to control the trainer, performing a workout through manual edit of slope percentage. I had the Garmin Edge 1030 to measure power, cadence and speed through the Assioma’s. The difference is every clear, which you can see in the pictures attached through the links below.

      From having discussed this now for a couple of days in different bike forum it is clear that I have to take the mental blow of accepting that my FTP is not as high as the Tacx values has shown earlier. It is about 50 W lower, judging by a new FTP test performed using the pedals for power metering. The support reply by Tacx is “update all firmware and clean it with white spirits and try again…”.

      Now wonder so many people in Zwift forums claim to have FTP values well above 300 W, if we all (me included) have been relying on the trainer power measurements (which we should be able to do…).

      Hera you find a section of my workout, showing the difference:
      link to teamscopum.se
      link to teamscopum.se

      Original ride files is found here:
      link to strava.com
      link to strava.com

      The curves follow each other pretty well, but the difference in power levels are around 30 W in the chosen area in the pictures above.

      Mental restart, and a bounce back to forget the old FTP value… :-)

    • condal

      Hello, I use the Assioma and an the Elite Direto Trainer. The measured ASSIOMA values are 3-4 watts below the Direto. This is in accordance with information from other ASSIOMA users. I think your TACX Trainer is not that reliable.

    • Michal

      @Michael Wallenius

      Power numbers of many people using wheel-one trainers on Zwift are inflated for two main reasons:

      1. Improper spindown calibration or even lack of calibration at all. Doing spin down on well warmed up trainer and tire is absolutely crucial for accuracy of wheel-on trainer but I think most people don’t do it at all or do cold calibration at the beginning of the ride (even worse). I think underwhelming manufacturers instructions and people laziness are at fault here.
      2. Many units are out of spec in terms of given resistance. I doubt every wheel-on trainer is calibrated individually. Accuracy of those depends on manufacturing tolerances and those are variable.

    • Pekka

      If you connect Assiomas through ANT+ only left pedal connects to your computer and right pedal sends it information through the left pedal. So, you’ll see only one connected Assioma in your bike computer. If you connect with BLE then you should see both pedals.

  108. Zac Fisher

    Does anybody know if the issue with the average power readings on the Wahoo Elemnt/Bolt has been fixed? Since the downloads are automatic I don’t know if something was pushed. I haven’t experienced the issue myself, but was never really clear where it reared its head.

  109. Jøran Gården

    My Direto and my Assioma Duo are quite similar – within 3W of eachother. Seems like the Assioma pedals reacts more slowly to changes than my Direto on Zwift. Funny…. Shouldn’t it be the other way around?

    And I’m not getting a clear understanding if the avg power error on the Bolt is fixed or not. Could not find any explicit mention of it in the update log at wahoo (or did I miss it…?)

    I left some suggestions for further developement of the Bolt to the Wahoo support approx 5mnts ago. Probably for no avail.
    Do anyone know of a discussion forum discussing the Wahoo products – and Bolt particularly?


    My left spindle has been change and the pedales working fine again , but new problem with the software update the left pedal did it easy but the right pedals doesn t want to get it so one pedale with new soft and old pedal with old one !!!!

    • D

      Close the Favero app and do it again (If u dont discover that right pedal is allready updated, just software did not show it.I had similar issue, but when i restarted favero app and checked again both pedals was updated)


      I will try fully charging them first because right now that s show me the right pedals not updated!


      Same problem the pedal is going in boot mode , and after it sayng software update and when it is finish it s going back to detecting mod and it can t find any pedals , i am restarting the app Left pedal say software updated 1.23 and right pedals say new updat available (again) i tryed with 2 different phone i will try with a tablet.
      When there is the software update it is taking really long like 10mn .


      It is ok pedales finally updated after favero did something on their side. Look like it is working fine i am using Osymetric ring.

  111. Steven D.

    These just arrived for me from CT. I also wish the unclipping was more like actual look or exustar pedals- it’s super difficult to clip out with look grip or the supplied cleats.

    I’ve had three data sets to compare so far with a left sided only 4iii precision, which I have compared with my powertap hub extensively. Two ( one indoor and one outdoor) look okay?:

    link to analyze.dcrainmaker.com
    link to analyze.dcrainmaker.com

    But one, an outdoor ride where it was 35 degrees or so and I frequently rode through puddles, doesn’t. (pictured) I was using my phone to read the 4iii via bluetooth and a lezyne for the favero via ant+. I calibrated both units at the 2 hour mark but it looks like the assioma was reading high both before and after calibration. They are over 20 watts apart at the one hour power mark, and the other two rides the 4iii was reading slightly higher. I’ll keep doing more comparisons but this longer outdoor ride worries me. Doesn’t look like Ray’s charts above.
    link to analyze.dcrainmaker.com

  112. Edoardo

    Is it possible to use Vector’s cleats on Favero pedals?
    On a bike I have the Vector2 and on the other I would like to mount the Favero …

  113. Will Spencer

    Hi Ray, I’m using the assioma uno with an ambit3, and pairs and works. However, I also have a Stryd and Stages meter on another bike, which once the suunto pairs to the assioma it effectively “forgets” the other power meter devices. I then have to re-pair with the Stages and Stryd. However, then the ambit3 is then no longer paired with the assioma. And I then need to re-pair with the assioma. It seems that the Suunto ambit3 can easily handle the Stages and Stryd together, but whenever pairing and using the assioma it can’t remain paired with the Stages and Stryd. Any thoughts on this? I’ve searched the standard forums and have found nothing!

  114. Justin Walstad

    Hey Ray,
    I bought these pedals from Clever with the DCR discount. Thanks for that!
    I have had an issue a couple of times where early in my ride (roughly ten minutes) my computer stops showing watts. The first time this happened, I stopped riding, turned off my computer, turned it back on, and it worked fine the rest of the ride (about one hour). The second time it happened was during a criterium so I couldn’t turn the computer off and back on. Needless to say, not seeing my watts during the race was a little frustrating. The pedals seemed to be working fine. I glanced down and could see the lights blinking normally. After the race I checked the battery level in the app and it was about 90% for each pedal. I’m using a Wahoo Elemnt Bolt. Anyone have any ideas?
    Thanks, Justin

    • Thanks for the support Justin!

      Hmm, in general I find that when something is fixed by turning off/on the bike computer, that it’s usually the computer. After all, unless you send a calibration command, the communication from the power meter to the head unit is one direction only (broadcast).

      I’d hit up Wahoo, as you can send support the detailed logs from that specific ride, and they’ll be able to troubleshoot what might have happened.


  115. Allen

    I recently received the Assioma pedals from CT . I noticed two weird issues while using the pedals on my first ride. The pedals are connected to my Lezyne super GPS computer. The computer is displaying both the Cadence and Power.

    1. The cadence never displays a value of Zero when I am stopped. If I stop at a stop sign the Cadence will continue to display a non zero value.
    2. Likewise when I am stopped the power will fluctuate between a value of 0 and 278 watts. It displays 0 then changes to 278. This process repeats every second until i start back pedaling.

    I tried unclipping while stopped and both items still occurred.

    I’m pretty sure this is not normal behavior but I just want to confirm. Is this likely an issue with my bike computer or the pedals?

    • Phil


      I have Assioma duo and a Bolt and I have this issue, maybe is something on lezyne side?

    • So there’s definitely a bit of delay on stopping pedaling in certain scenarios – about 1-3 seconds is what I’m seeing in some recent tests (see my recent Specialized In-Depth Review). But certainly it should be presenting 0’s very shortly thereafter. So if you’re talking more than that, then something is up.

      A fluctuation between 0 and 278 sounds like something is horribly wrong. That type of error I’d typically assign to a power meter rather than a head unit, but with Lezyne I’m a bit less certain (simply because there isn’t a ton of data to backup edge case type issues, whereas on Garmin/Wahoo, the cases are fairly well understood).

      Any chance you have an ANT+ stick and a trainer? Or perhaps even just pair the Wahoo Fitness (free) app to your Assioma via BLE and record the data stream concurrently then to see what the differences look like?

    • Allen

      I figured out the issue.

      Along with the Favero Assioma, I also have a Garmin magnet less speed sensor.
      When both are connected via ANT+, it causes the two issues with cadence and power.

      When using a Bluetooth speed sensor, the cadence and power display as expected.

  116. Tim

    Ordered mine from Clever Training. Very excited. Any suggestion for the power fields on should show on my Element? Power 3s or Avg. Power? Or something else more meaningful?