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Stages LR (Dual-Sided) Power Meter In-Depth Review


It’s been a long time coming.  For Stages, the development path of Stages LR has been over three years till it started shipping last month, with most of it in the public eye in the most watched bike on earth: Chris Froome’s.  Of course, Stages got its start prior to Team Sky with their left only power meter (now rebranded Stages L), but it wasn’t till their sponsorship of Team Sky that the company and its products took off.

After all – if Chris Froome can win the Tour de France on a Stages Left-only unit, then it’s probably good enough for you too, right?

Well, perhaps not exactly, as Team Sky and others soon figured out.  At Team Sky’s request, Stages was tasked with creating a dual version, so they could more accurately track riders progress.  As they learned, aspects like fatigue and left/right leg differences really do impact overall accuracy.  So the next few seasons we saw Team Sky quietly riding various prototype dual-leg models.  It’s the resultant of these models that eventually became Stages LR that was announced last summer at Eurobike. (Side note: I detail the backstory on that here in this section.)

And as of last month, the company has started shipping this model to consumers.  The big question though: Is it accurate?  And more importantly for many – does it address some of the connectivity issues that seems to trouble existing Stages users.  For those questions, I worked through two different Stages LR cranksets over the course of two months gathering boatloads of data.

Thus, let’s dig into it.

(Oh, and as always, I’ll be sending back both loaner cranksets to Stages shortly. Especially because I’m pretty sure the airlines would be even more displeased than on my way down here with how many cranksets I’d have in my luggage coming back from Australia next month otherwise.)



In my case, the Stages LR was delivered as a single boxed product.  However, you can actually buy it as an upgrade to an existing Stages Left-only unit (thus making the pair).  Meaning, you’re buying the right side.  The box wouldn’t likely differ very much, since the majority of the space in the box is for the drive side crankset.


Inside the box, you’ll find the drive-side crankset, as well as the left-side (non-drive side) crank arm.  You’ll also find a small plug to twist into the non-left crank arm to make things look pretty.  Then there’s some paper junk.


Here’s a closer look at the backside of both crank arms:


And then the non-drive side:


And finally, the little package of paper stuffs including ANT+ ID cards and a user guide that you can use to start a (very) small campfire to roast marshmallows on after you’re done reading them.

DSC_8000 DSC_8001

Oh, and there’s even a spare ‘o-ring’ in the package too.

What you see above is basically par for the course on cranksets, since it’s largely taking an existing Shimano Ultegra crankset and rebranding the box, plopping on the Stages power meter pieces, and then calling it macaroni.  Just like Quarq, Power2Max and others do for cranksets.

Installation & Configuration:


As with most power meters, the installation will vary not so much on what you’re installing, but rather – the situation you’re coming from.  By that, I mean that in the case of Stages LR, if you already have a Shimano crankset on your bike, then the swap to Stages LR could very well take you less than 5 minutes all-in.  Quick and simple.

Whereas if you’re coming from a different crankset featuring a different bottom bracket standard, then you’re likely in for a longer journey.  In my case, I was half-way in between.  When I initially installed the Stages LR on my bike I was swapping out from my usual Quarq D-Zero.  That had a very slightly different (smaller) bottom bracket standard than what the Shimano was using.  So I had to swing around the corner to the bike shop to pick up a different bottom bracket, and then swap all that out.


At this point, I was already deep into leveraging the various tools of my bike toolbox – most notably the PressFit installation goods.  I wouldn’t recommend buying such bottom bracket installation tools unless you plan to use them frequently (whereas I would recommend plenty of more general tools).


Once the bottom bracket swappage was done (unnecessary if you already have Shimano gear on your bike), then it’s as simple as sliding the drive side through the bottom bracket:


After that, there’s merely two bolts to tighten on the left crank arm, attaching it to the drive side.


Oh, and somewhere along the way you need to remove the small slips of plastic tape that separates the battery contacts from the coin cell batteries.  On the left-crank arm, that’s easily done with your fingers.


Whereas on the right crank arm you’ll just need a small screwdriver to open up the battery compartment.


Next, anytime I do work on any bike crankset, I find it a good habit to toss the bike on a trainer and pedal for about a minute – starting easy at first and then building up intensity.  Finishing with 2-4 sprints, something like 4-8 seconds each, pedaling reasonably hard.

I do this for two reasons:

A) If I’ve hosed something up on the crankset installation that causes a catastrophically viral-video worthy break, I don’t plant my face onto the pavement.  Instead, the badness is contained to my bike secured atop a trainer.

B) The sprints help to settle the crankset, and tighten things up – which is good for power meters.  Most power meters require a very short settling period, of which the above procedure will take care of.

At this point, you’ll do a zero-offset and you’re good to go.  Don’t worry, I’ll cover that zero-offset in the next section.

General Use Overview:


The Stages LR in many ways acts and feels like an existing Stages product, except now on both sides.  However, we’ll start with some of the basics and go from there.  The first tidbit worth noting is that the unit has a status LED on the inside of the crank arm, allowing you to quickly validate that it’s alive:


This new status LED is also now found on all new Stages left-only units shipping as of about 1-2 weeks ago.  They somewhat quietly clearanced inventory of existing units for this new generation.

Next to that status light is, of course, the battery compartment as noted earlier.  This compartment, on each side, houses a single CR2032 coin cell battery.  Stages says that the system should get about 200 hours of battery life per coin cell battery.  You can of course just buy these in bulk super cheaply online, which is what I do (20 for $8).


One minor tip to point out (since I just learned this lesson yesterday), is that if you’re travelling with your bike, ensure your bike tool actually has a mini-screwdriver on it.  Mine just had a standard one, and the AirBNB house I’m in didn’t have a mini-screwdriver.  I ended up using a butter knife to get it open, but maybe something to add to your bike bag just in case you need to swap batteries mid-trip.  Many other power meters have shifted to using screws as well, though some of those use hex screws instead – which usually match your bike tool.  No biggie, just purely a pro tip I figured I’d share.

With everything all installed, we’ll need to get it paired up to your bike computer.  Stages was in fact the very first company years ago to do dual/concurrent ANT+ & Bluetooth Smart transmitting power meters, and that continues today as well with the Stages LR.  This means it transmits power over both ANT+ and Bluetooth Smart, within the respective power meter standards.

As such you can pair it to basically any device or app that supports power meters.  Be it Garmin, Wahoo, or even Stage’s own Dash head unit.  Same goes for apps like Zwift, Strava, TrainerRoad and more.

Now, I’ll talk at length about connectivity and drops in the next section, so for now let’s just get it paired.  In my case, I’ve mostly been using a Garmin Edge 1030 to collect data from it.  And in doing so, largely over ANT+, since most folks in the industry would recommend that since you’ll get more advanced data right now over ANT+ versus BLE.


As with most head units, you can change the name from the ANT+ ID to something else.  In the case of Stages and newer Garmin devices that support Bluetooth Smart pairing, if you want to pair to the ANT+ variant, it’s the one listed without the name ‘Stages’ in it, within the list.  Here’s a handy guide:

ANT+ side: ‘43016’
Bluetooth Smart side: ‘Stages 43016’

So in the case of the above photo, you’re seeing just the BLE channel (because I took the photo after I had paired the ANT+ channel already).

Most power meter companies follow that spec of putting the brand name in the Bluetooth Smart pairing ID, followed then by the ANT+ ID number (within the Bluetooth Smart ID).  Finally, in the case of Stages, there’s no need to set a crank arm length, and thus your head unit shouldn’t ask you for one.  That feature is mostly just used on pedal based power meters.

With that all set, you should do a zero offset.  On Stages units, you need to ensure your crank arms are pointing straight up and down (vertical).


Then just tap calibrate, which triggers a zero offset:


The result in a calibration value that you can keep an eye on.  I recommend doing this prior to each ride, mainly so that if something is amiss, you’ll spot it quickly.  An example of something being amiss is that the unit either fails to calibrate, or the calibration value shifts massively.  Typically you’ll see it within only a handful of digits, primarily based on temperature.


With all this completed, you’re ready to ride.  Like most power meters, Stages LR transmits the following values to head units:

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

To see this a bit, here’s a file on Garmin Connect recorded on an Edge 1030 that shows data from a Stages LR ride via ANT+.  Within it you can see the various metrics from above recorded in the file:



Note that if you record via Bluetooth Smart, you won’t get the pedal smoothness or torque effectiveness data, even if recording on a head unit that supports it.


Also worth noting is that if you use Stage’s own Stages Dash, you’ll get additional details recorded to the activity file around aspects like battery life, zero offsets, and firmware updates.  I’ve long thought that might actually be one of the coolest features of the Stages Dash.  I talk about that more in my Stages Dash review.  The below is a sample screenshot from Stages, since I didn’t think to capture this data earlier.

Power Meter Graph

In addition to all the standard pairing, Stages also supports connectivity via their smartphone app.  This app is mostly used for updating firmware, but it also has other purposes:

2018-02-15 13.23.51 2018-02-15 13.37.29 2018-02-15 13.32.39

For example, you can double-check torque values on it, as well as validate zero offsets:


2018-02-15 13.37.38 2018-02-15 13.38.23

One of those other purposes is Stage’s high-speed data rate capture, which allows you to record Stages data at up to 64 times per second, in effectively a high-speed data capture scenario.  This was rolled out long ago on the Stages left-only cranks, however, it’s not yet enabled on Stages LR.  Stages says it’s on their to-do list, but just simply fell lower down the priority totem pole. Since it’ mostly only used for track start type scenarios, it’s not really something I’d consider a high-priority item either.

With all that set, let’s dive into data accuracy.

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 (e.g. vibrations).  For reference, Stages LR has a claimed accuracy rate of +/- 1.5%.  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 Stages LR I was using these other power meters concurrently:

Elite Direto Trainer
Garmin Vector 3
JetBlack WhisperDrive Smart Trainer
PowerTap G3 hub based power meter (three different units)
Wahoo KICKR 2017/V3 Trainer

All of which was tested over the course of about two months, on two different Stages LR cranksets.  I’ve ignored the previous test rides I did last August on a pre-production unit.

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 520/820/1000/1030 units).  For the vast majority of tests on the Stages LR I used an Edge 1030 and FR935, along with a bit of the Edge 520 as alluded to elsewhere in the connectivity section.  But I also recorded on apps as well, including Zwift.


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.

I’m going to start this review with the most recent data set – a ride from just 75 minutes ago. Why?  Because it’s the ride with the freshest firmware (just yesterday’s) that appears to resolve a bunch of little quirks I’ve seen/reported over the last two months.  In effect, it’s the first time that all the stars have aligned.  Which isn’t to say previous rides have produced inaccurate power, or that Stages was even at fault.  Rather, various rides had various connectivity things or other power meters go crap on me – but I’ll get into that later.  As a general rule, I like to have no less than 3 power meters in a test, so when I ‘only’ have two, it bugs me a bit.

In any case, this ride was a straightforward outside ride with three units – Stages LR, Vector 3, and a PowerTap G3 hub.  The road conditions were mostly smooth pavement, though some sections of less clean pavement.  Plus speed bumps.  Here’s the overview (and here’s the files in the Analyzer if you want to look at them online):


I captured data across a slew of head units, but notably captured Stages LR data on three different units – an Edge 1030, Edge 520, and FR935. I did this concurrently across both ANT+ & Bluetooth Smart, for reasons I’ll get into later on in this review.

As you can see from the overview, the units tracked virtually identically across the entire ride.  We can dig into one of the points from a stoplight where I go from 0 power up to 400w pretty quickly.  Note this is smoothed at 5-seconds, merely to make it easier to see.


Not that all power meters within +/-1 second of each other show the uptick in power.  As is always the case, it’s rather difficult to get multiple head units to precisely align due to transmission and recording rates, as you see here.

The one thing you do notice though is that on the BLE connection to the FR935, you see those two little blips.


Those are technically drops. It’s just that when smoothed you don’t see them.  But what’s weird is that they aren’t full drops – rather, they drop by 50w or so (versus normally a drop is considered 0w).  Not entirely sure what to think there.  But from my standpoint that technically falls under connectivity issues rather than accuracy (though, the net results impacts accuracy).  But I’ll cover that separately in the next section in this review.

Here’s a mild sprint up to about 600w or so, and you can see that all of the units follow each other perfectly here (a slight variance on the BLE peak power):


Equally important, there’s no droppage issues from an accuracy standpoint after I conclude the sprint, which can sometimes be a sticky point for power meters.

If we look at cadence for this ride, that too looks identical across all the data sources.  There are some little blips on the Vector 3 cadence while I’m semi-stopped.  It’s almost as if it picked up the slight crank movements I did when moving forward on the bike a bit at the 33:25 marker (I was on the side of the road texting The Girl that I had hit my turnaround point, I moved halfway through that again to get further away from the road).


Next, let’s look at a ride I did immediately after the above outdoor ride – a trainer ride.  Why on earth would I jump on the trainer after an outdoor ride?  To poke at cadence and power values across a broad range.  Specifically, I wanted to see what happened when I went really low on cadence (20RPM), and really high on cadence (160+ RPM).  Plus of course everything in between.  Here’s that quick 8-minute step-test:


To walk you through what I did, it’s pretty straightforward:

A) I started at about 80-90RPM, and then went up in 10RPM increments to 130RPM, holding ~30 seconds each
B) Then I significantly increased the RPM to about 170RPM, briefly.

As you can see – the units tracked very nicely all the way up to about 160RPM, at which point it appears I lost the Stages unit briefly.


Most power meters have some sort of top-out point, usually in the 160-190RPM range.  Stages lists 220RPM as their top cadence.  In my case, it’s also plausible that since I only spent a few seconds at that high level of cadence, it could just be recording nuances causing the drops.

Continuing with the test, I then did:

C) Dropped back down to 70RPM, and continued slowing my RPM’s down gradually
D) Eventually, I got down to 20RPM (that’s three seconds per revolution!)
E) For fun, I threw down 180RPM (and Stages tracks just fine this time)

The cutoff point here appears to be 20RPM.  Below that and the cadence drops out, above that and it’s just fine.


This too is specified on Stages site:


These limits are perfectly acceptable/reasonable/logical in my mind.  Also, note that power values stayed constant with the Garmin Vector 3 throughout.  I was also atop a trainer that transmits power, but the power firmware is beta there and wasn’t quite as stable as I wanted – so I removed that from the graphs to minimize confusion.

Now I’ve also done some more generic Zwift workouts and such, like this ride here with a pile of sprints throughout:


As you can see, throughout the sprints things aligned quite nicely against the Garmin Vector 3 – virtually identical save one drop at about the 2-minute marker (but this was prior to the firmware update to address that).

But let’s head back outside, it’s more interesting there as always.

Part of my challenge recently is that previous to the firmware of two days ago, Stages was experiencing drops depending on how you connected to it.  Meaning, if I connected via ANT+ on certain head units, it’d drop the connection (but not other head units).  Using BLE in theory made it better, but in reality I found it made everything worse (both ANT+ & BLE).  So I ended up with some rides whereby the data when transmitting was perfectly accurate – but would be blemished by the occasional dropout.

That aside, this ride has virtually no dropouts. There’s some settling of power meters in the first portion of the ride after being installed on the bike, so here’s a look at the middle portion:


You can dig into the full file above, but it’s basically the same for the remainder of the ride, the three power meters are almost indistinguishable, despite boatloads of ups and downs on power (this was a river loop where there’s a lot of changes in power).

The workaround to the dropout issues (again, prior to yesterday’s firmware) was basically using the Edge 1030 – for which dropouts didn’t occur as long as I didn’t also connect Bluetooth Smart devices concurrently.  And for rides where I did that, the tracks looked beautiful.  They matched Garmin Vector 3 and a PowerTap G3 hub quite well.  Such as this snippet from a couple hour ride:


There’s some slight offsets between the units, which makes sense as, in theory, the PowerTap G3 should be the lowest and the Garmin Vector 3 the highest.  In this case, about +/- 3.7% from the Stages centerline, which would account for drivetrain efficiencies as well as any accuracy differences.

And then this hour or so long lunch ride here where again, all three units aligned very nicely. Here’s a closer look at an 800w+ sprint:


And then there’s this sub-hour long ride (which lacks a functional G3 hub as it had to be replaced), but you can at least see how it compares against Vector 3 on a mean-max graph.  What you notice is very slight differences/offsets when you get to the sub-10 second power, which is pretty common on these graphs.


Prior to these rides, there were other firmware issues whereby the right side of the unit would output slightly lower power values (1-3%) than it should have.  So while the left side matched perfectly to Vector 3’s left side, the right side dragged down the picture.  On these rides (if using an Edge 1030), I didn’t experience any drops.  This issue was fixed back on Jan 26th.  Given it’s been fixed, I’m not going to re-analyze those rides, since we already know the story there.

Now, I’m going to talk about droppage in a second – but on the accuracy front I’ve been seeing good things since late January – so I think we’re definitely good there for both power and cadence.  The multitude of data sets above shows that pretty easily as well.

Update – January 2020: It’s worthwhile reading GPLama’s thoughts on Shimano R8000 & R9000-series based cranksets (for which the Stages LR is based upon). There’s some worthwhile issues there that are very real. What’s more challenging is determining how universal they impact every crankset (which, is part of the problem). On some cranksets off the manufacturing line, the impact can be zero to negligible. While on other cranksets it can be substantial, especially coupled with how different people pedal from a force standpoint. In the data from this review, you’ll see that things are largely quite good – without much issue. And in fact, I went on to buy another Stages LR for my own usage longer term. And the vast majority of that data from the last two years mirrors that of this review. Yet, at the same time – there are also rare days where things don’t match and I see the right-side low. That’s non-awesome. Yet, at the same time, I’ve also had non-awesome days on Favero Assioma pedals too. Sometimes you just can’t win. As of January 2020, I’m currently using a non-Shimano based Quarq DZero unit as my main baseline power meter.

(Note: All of the charts in these accuracy sections were created using the DCR Analyzer tool.  It allows you to compare power meters/trainers, heart rate, cadence, speed/pace, GPS tracks and plenty more. You can use it as well for your own gadget comparisons, more details here.)

Does it drop?


Back a year or so ago, there were media reports that Chris Froome had made an interesting off-hand comment when responding to a reporters question on why he used the older Edge 810 versus anything newer (the team was otherwise outfitted with Edge 820’s last season, at Team Sky’s – not a sponsors – expense).  He noted that he had found that the ‘newer Garmin’s had data drops’.  At the time I found this a peculiar comment because it just wasn’t something people were seeing in ‘real life’ on road bikes.  But now in looking back at things, I get it: The real wording should have been “I was seeing drops with Stages LR”.  But of course, he couldn’t say that – Stages was a sponsor. Garmin wasn’t.

When I first started this testing process in December – I quickly saw those same drops as well…also on newer Garmin devices.  Specifically in my case the Edge 520 and FR935.  Both highly popular devices.  And neither are devices that have ever dropped on any other power meter for me (I use 2-3 Edge 520’s per ride, connected to 2-3 different power meters per ride); nor are drops even remotely common for either unit on other power meters.   So in effect…if it quakes like a duck, it’s probably a duck.

I went back to Stages on this and they did some more digging.  In fact, the topic of Stages and drops is as old as power meter time itself.  What I was surprised about was that this was somehow still a thing.  Still, I let them dig.

In doing so they showed they could reproduce Edge 520 drops like I saw relatively easy, and that it was stable on the Edge 1030 (which I saw too).  But to me that’s not really an acceptable admittance.  Again, regardless of whether Garmin is at fault – nobody else has this problem (sidestepping the mess that is the Fenix 5/5S connectivity debacle, which I don’t use). On this old dataset, I highlighted each of the drops in this 41-minute ride (15 total drops on the Edge 520).


So they continued to dig a bit – and the outcome of that was a change in firmware that tweaked the way the communications stack delivered power to both ANT+ & BLE signals.  Specifically, two changes occurred.  In Stage’s own words, they were (geek detail ahead):

“The firmware change was directly related to the timing of when the radio was transmitting and receiving both ANT and BLE messages.  The easiest way I can explain it being the non-programmer that I am, is that at times we were trying to use the radio at the same time to get ANT and BLE messages out and in (with BLE) via the radio.  The change was really just a refinement of the timing and length of when each message was sent and when and how long the radio was on listening for a BLE return message.  As I described previously, there was always messages going out but not all of the 4hz for both BLE an ANT were getting out, so it worked but was not perfect.  This issue was greatly amplified when there were other interferences such as multiple head units, wifi, trainers etc.  Now that we have made this change all the messages are properly being sent at 4hz.   This makes it much more likely that the head unit will receive and record at least on message a second and with a Dash that we receive all 4hz.” [DCR Note: 4hz means 4 times a second]

“The other change was to deal with how some BLE head units deal with coasting, on most ANT devices they recognize if you coast and drive your power to zero.  For some reason on some BLE devices were holding onto your last power number when you coasted.  So we made the power meter smart and it will drive your power to zero if you coast.”

Note that the Stages LR already was broadcasting at a higher rate than existing Stages left-only units (ignoring the new left-only units they just started shipping a week or two ago, which I’ll post about separately shortly).  That update for the LR units was issued as firmware 1.1.8 and was released two days ago and incorporates the changes noted in the above two paragraphs.

So where does this leave things?

Well, I think we’re (finally) good. Basically, two specific firmware updates got me into a good state:

Jan 26th: Fixed low-right side issue in interim beta update (thus, power is accurate after this on all my rides)
Feb 13th: Fixed dropouts for Bluetooth Smart, and ANT+ on certain devices (for me anyway – minus one little blip)

Now you may be saying – how do you know the dropout issues are fixed?  Well previously with the dropouts they manifested themselves pretty darn quickly.  Perhaps every 5-8 minutes on ANT+, and almost instantly/wonky on Bluetooth Smart (I have some crazy ugly charts from that). I could repro those situations on every ride if I wanted to since December.

Now on both of today’s rides, it’s almost perfectly clean.  Stages said they found two specific issues, which they said was related to power handling on the communications stack. The proof appears to be in the pudding – no full drops (just one brief jitter that may or may not be Stages’ fault).

I will note though that the broadcasting power on Stages’ units (including the LR) continues to be substantially lower than other ANT+ sensors.  For example, take a look at the RSSI values on Vector 3 (ID 324103) and Stages LR (ID 34770) side by side. A higher value is better (meaning, –21 is better than –35), the closer to zero the better. On the left is what happens if I place the test WASP device on my out-front mount, and then to the right is what happens when I place it on my stem.  Even when placed directly atop the bottom bracket (in between the crank arms), Stages is still significantly lower than Garmin Vector 3.

2018-02-16 16.27.40 2018-02-16 16.28.05

While in my tests the signal strength now seems strong enough for my head units, where this matters is if your specific bike/body configuration puts it on the edge of reception, then having that bit extra means the difference between good and bad. That’s historically where Stages got itself into trouble, primarily on triathlon/TT bikes, mostly for people with wrist-worn watches, due to body/bike interference.  Since I don’t have a triathlon/TT bike on this trip – I can’t test that at this time.

Of course, I’d love to hear anyone’s results on that in the comments (just be sure to be on 1.1.8 first!).

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 fall, and in this case that was November – which is inclusive of all the power meter players on the market.

The above-noted guide covers every model of power meter on the market (and upcoming) and gives you recommendations for whether a given unit is appropriate for you.  There is no ‘best’ power meter.  There’s simply the most appropriate power meter for your situation.  If you have only one type of bike I’d recommend one power meter versus another.  Or if you have different needs for swapping bikes I’d recommend one unit versus another.  Or if you have a specific budget or crankset compatibility, it’d influence the answers.

I’ll be publishing a pricing update in March, covering where pricing stands for the year, though I don’t expect too many shifts between now and then.  Nor do I expect much in the way of additional new entrants not already known/released.



After a two month journey on Stages LR, I’m finally at the point where I’m happy with the results it’s giving me across all fronts – both accuracy as well as connectivity.  Of course, for many consumers, those are kinda considered baseline starting points (or, I hope they are anyway).  The next question is pricing.

In that realm, Stages sits at $999 for the Ultegra edition I tested (inclusive of the full crankset).  That’s identical to Pioneer’s offering at $999 as well, and the same as Garmin and PowerTap with their pedals at $999 (and Dura-Ace at $1,299 also matches Pioneer).  All of which give you distinct left/right power.  There are nuances to each implementation though from a tech standpoint.  Pioneer has high speed and detail data metrics, but only on their platform (and lacks Bluetooth Smart connectivity).  Garmin gives you less detailed metrics than Pioneer, but on a more widely adopted file standard (for example, WKO4 can see the data).  Stages gives you a full crankset, so if you don’t want to deal with changing pedal types or just prefer crankset power meters – then that’s a pro for them.  Like I said in the previous section – there’s no right answer here, just solutions for your specific requirements.

The end of which is that I’d have no problem riding a Stages LR unit on my road bike at this point with the latest firmware.  I can’t speak to a triathlon/TT setup at this moment, but hopefully others can chime in.  Historically I never had issues with my Stages left-only units and connectivity on my tri bike, but as noted, connectivity issues when seen seemed highly dependent on your specific bike and body.

In any case – thanks for reading – and if you’ve got specific questions feel free to drop them down in the comments below – happy to try and track them down.

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  1. MN

    I have both Garmin Vectors and Stages. Both about 2-3 year now and the Stages dataloss has been huge and specially indoors. During the winter when I use a bike on a trainer there is almost all the time data loss with stages if other “radios” are turned on. The more there is radio noise (WiFi, TV, etc) the less comes through. Have not tested the signal strength but I saw the correlation quite soon. After starting to stream something in my laptop, the power data was interrupted a lot. Outdoors ofcourse thats not a problem.

  2. Rob

    Since the two sides of the Stages need to be linked, does it show up as a single power meter in head units and Zwift like Vector3? Or is it two sources like the P1?

    • Cristi

      For ANT+ it shows as a single unit (you connect to the left one in fact). If you want to use BT, that doesn’t work, so you have to connect to both left and right (which is not supported by Zwift AFAIK).

    • Nate

      For me, my stages LR shows up as two Bluetooth power meters in Zwift but because they are linked (performed first once in the stages app), the left unit total power shows the sum of the left and right output and the right pm only shows total right power. You just select the left unit on Bluetooth with iOS zwift.

  3. Paul

    will it be available for Campagnolo?

  4. drPeperino

    Hey Ray,

    I have tested at least 4 stages (2 Ultegra gen 2 slightly different in appearence, 1 C’dale Gen1 and 1 Sram Gen 1) all on bikes that were installed on my Elite Direto and I generally saw a strage differentiation in power outputs.
    I compared each time the single Stages unit against the Direto, but results are quite repeatable:

    One of the Ultegra Stages (mine) is roughly 10W below the Direto: tends to match at low cadence and tends to get farer at high cadence (107-110 rpm).

    Another Ultegra (lended to me for 2 work outs) was quite matched on the Direto, or slightly above (less than 10w however)

    The SRAM Stages was mathcing the Direto very nicely (just getting 20W above during the 2min recovery portions of the workouts)

    the CDale Stages is reading quite consistently 20W over the Direto.

    Did you compare the various Power meters of this review with the Direto?

    If the LR has basically two PMeters (one per side) and it starts to tell you that you’re unbalanced how do you figure out if that is your leg or if it is the power meter accuracy? I’m asking this because you can buy the right side to pair your existing left side, but across the left sides I have tested I see significant differences one another.

    thank you so much for the article, I saw the same connectivity issues and I started to think it must have been a Stages downside and now I feel that my impression is confirmed.


    • I did some early rides on the Direto way back when, but nothing with good data (pre-firmware updates I noted).

      Still, doing successive trainer rides with different power meters is a really tough nut to crack on a lot of levels. Partially because you end up with different warm-up periods on the Direto, which could also impact left-leg balance issues.

      I wish I had a good answer for you there. The best answer would be to have another power meter to compare against…which, isn’t always easy. :(

    • DrPeperino

      Thank you so much for the feedback anyway Ray.

      I would like to have a third PM to try out, and I could eventually find someone who could kindly lend me a Vector possibly, but I had performed a fair number of rides with the Ultegra Stages against the Direto, and the C’dale Stages against the Direto and the results are quite consistent (with hte exception of few reco rides in which data from the different PMs got closer for 20-30 minutes): the C’dale exceeds the Direto by a rough 10%, except at 50-55 rpm in which they get fairly close (C’Dale over the Direto by 5-7W), and the Ultegra is slighly below, usually by a 10-15, except at 50-55 rpm where they seem to align with few W difference.

      The difference between the two PMs is reflected also in outdoor experience: the C’Dale Stages gives me out higher values than the Ultegra one, in respect of the similar hear rate and effort perception.
      Initially I didn’t realized the difference could be in the PM readings, but now I undertsand that that feeling of be feeling really well was actually the PM giving out higher power values at same HR and effort perception than what was doing the Ultegra.

      They are definitely giving out different values, and what I wonder is how can Stages give you a LR power meter which works basing its reading on two different PMs, and tell you what is your balance, if there could potentially be so much difference between the reading of two distinct units.


    • Michal

      The answer is simple. There shouldn’t be such big difference as you’re describing. It’s unacceptable. One of your power meters is not working properly. Static torque test could tell you which one is lying to you with reasonable confidence.

    • DrPeperino

      Hi MIchal,

      is the static torque test something I could do by myself, or will I need to ship the unit to Stages, given that they accept the “claim/request”?

      thank you very much for your support,

    • Michal

      You can do it yourself. In mobile app there is option called “high speed” which allows to check torque applied on the crank (although last time I checked for some reason it was only available in Android app, and disappeared from iOS version, but maybe it has changed). With ability to check torque on mobile app you need to put crank arm in 9 o’clock position, exactly parallel to the ground, block the wheel, and hang known weight from the pedal (20kg for example). You can calculate torque your power meter should report for given weight (torque = weight (kg) * 9.81 (gravitational acceleration, m/s^2) * crank arm length (m); so for example: torque for 20kg weight and 172.5 mm crank = 20kg * 9,81m/s^2 * 0,1725m = 33.8445 Nm). Then you can compare expected value to the reported value.

    • DrPeperino

      that’s really a good idea, I’ll try it straight away (to come home with a handful of data that will certainly just break my mind and make me as fast as I was before!! :P)

      I’ll let you know as I’m really curious to try this out.

    • Michal

      Good luck on playing scientist ;)

    • DrPeperino

      I tried last night with a big water bottle (about 5kg) but for the moment results are not conclusive. I fear that 5 kg are not eonugh to reveal measurement issues.

      I’d love to try with 20kg or my own weight but at that point comes the problem about how to fix the bike and apply the load without too many shakings/unbalances: I have no idea of what kind of weight I could find (that I could hang from the crank arm without touching the ground), and if the weight were me then I don’t know how to stand still without any move on one single leg, I’d tend to move continuously trying to find balance and as far as I saw that is shaking the reading as well.

      I contacted Stages Support about this and for the moment they asked pics of the app while connecting and zeroing the sensor, and pics of the battery compartment.

      I’ll keep you posted on the updates if you like.

    • Michal

      To do this procedure I installed my bike securely in the indoor trainer and put it higher on the two separate tables (trainer and front wheel, with empty space below the crank). As a calibration weight I used 5x 5kg barbell plates weighted on higher precision scale, and then combined them using… metal paper towel holder. I also used additional metal hanger to hang it from the pedal. Note that I had help from the other person. This is doable alone but rather difficult. Finding when torque is the highest (=crank is parallel to the ground) is much easier when someone is controlling the break while you’re slowly spinning the back wheel. And the last thing. To do this properly calibration weight must hang stable from the pedal. I don’t think it’s possible when just standing on the pedal with your own weight ;)

    • DrPeperino


      That’s much more complex than what i thought.
      I don’t have a higher precision scale to calibrate the weight, and also the whole setup is a bit complex
      Let’s see if Support sorts this out in a different way..


    • DrPeperino

      Michal and all,

      just wanted to let you know that Stages replaced the unit, they suspected issues do to the calibration value of typically 835-845, and once received the unit was replaced free of charge with a Stages L.

      The new one actually calibrates at about 890 roughly and values are more in line with the Ultegra one.
      By the way signal seems to be a little better than before (disconnections occur, especially since I have a lot of wifi connections very close to the garmins I use to read the stages, but I’d say connection is slightly more stable than with Ultegra).
      I updated the firmware and, strange enough, the procedure says it didn’t complete succesfully but now the firmware indicated by the App is the new one and says there’s no new upgrade for the unit.

      Let me say TOP CLASS for the Stages customer service: I experienced issues, this is true, but I always got new units for free back from their customer service.


    • Pete

      Hi Luca,

      Interesting point.

      I previously owned the following gen 2 stages cranks and compared them with my Tacx Neo which is very consistent (and apparently very accurate)
      Cannondale: 15w higher than neo
      Ultegra: 5-10w higher
      Duraace 9100: 10w higher

      To cut a long story short these were all stolen so I now have a new ultegra stages LR pm and can echo much of Rey’s comments including:
      – data loss is much reduced compared to gen 2 versions
      – the new stages PM regularly reads 10w below the Neo (including steady state efforts at about 300w)
      – calibration seems to be inconsistent because sometimes it agrees with the Neo very closely (within 1w at 2/5/10 min peaks).
      – riding indoors on the Neo the power balance appears to be sensible when Stages agrees with the Neo. Say 52/48 or better. Other times I think it over reports left leg power.


    • DrPeperino

      Hi Pete,

      I read your comments and I have a question on your three points at the end: why do you consider that calibration is inconsistent? I’d say it is a point related to power readings that at times is very close to the Neo while other times it is those 10w lower.

      I don’t understand the third point. What do you mean when you say that teh power balance seems to be sensible when Stages agree with the Neo?


    • Mike Bailey

      I am very interested in this, especially your third point, because the dual-sided Stages (which I now own) has been providing power readings significantly below the single-sided Stages I own, and has been telling my my L-R balance (outdoor rides) is as off as 65-35. I have never been injured, and I don’t “feel” that lopsided.

      I’m wondering, though, how you judge the balance on the Neo. Does it provide that? (I don’t see how, since it’s not crank based.)

      Thanks for your prior posting and in advance for your answer.

    • Pete

      Hi Mike,

      I was trying to say that the power balance is sometimes off and appears to vary between calibration runs. As you said the Tacx Neo doesn’t report power balance so I’m just looking at consistency from one ride to the next.

      For example, I did a 2 hr ride today with a balance of 51.7/48.3 which seems sensible given it was a steady ride (I’m very close to 50/50 at threshold). Other times I’m constantly seeing 10s average values of 55/45 and end up with 54/46 or worse. Doesn’t seem right to me.

      Btw, it was much worse before the firmware update mentioned in the review. On the old firmware I’d regularly see a balance of 60/40 which absolutely didn’t reflect what I was doing on the bike.

    • Mike Bailey

      Thanks again Pete! A further question: Right-Left balance could be off in three ways:
      1. Overestimating Left power (leading to overestimated overall power)
      2. Underestimating Right power (leading to underestimated overall power)
      3. Balance only (without affecting overall power estimation)

      Do you have a sense of what it was/is when balance is off?

      And my lopsided power readings are happening with the latest firmware. (I wish I could get an estimate of my balance another way, so I’d know.)

    • Pete

      I’m not sure exactly what the problem is. I’m guessing that one of the cranks is returning a relatively high/low value following recalibration. Given the variation I’ve seen when comparing power numbers to my neo I think this is entirely possible.

      I have a bit of experience with the ANT+ protocol and can say that power balance values are sent as part of a standard power only message which includes the instantaneous power and the % contribution from the right leg. I guess this means that the balance could be incorrect without affecting the overall power estimation but I doubt it. The firmware would have to be fundamentally flawed and I’m not seeing that behaviour…

      What do you see when you calibrate your stages pm via the phone app or garmin head unit? I’ve noticed that the values returned for the LH crank are somewhat consistent… in the range 899-902. For the RH crank I’ve seen anything from 899-908.

    • Mike Bailey

      I haven’t been riding my two-sided Stages much, because I don’t yet trust it. (I’m going to be doing a simultaneous comparison of Stages two-sided, Computrainer, and PowerTap later this week and will at least know how much to test the overall power.)

      But at the request of Stages tech support, I took pictures of the zero reset page the last two rides. They were: (891,907) and (889,905). I don’t really understand these numbers and assume (?) there’s not a problem that the first (left?) and second (right?) in each pair are somewhat different.

    • Pete

      Hi Mike,

      Just thought I’d let you know that I updated unit to latest firmware (v1.2). It solves all of my issues.

      Zero reset values have changed somewhat following the upgrade… from 900/903 ish to 892/902. Slightly worrying but it works.

      Power numbers now match Tacx Neo exactly which is convenient. Power balance favours right leg a little more and seems to better reflect reality. If you repeatedly run calibration you get the same zero reset values.

  5. Sam

    Completely off topic but I love the sight of a good looking and cleaned chain!

    • Ironically, 45 minutes after I posted this review, while starting to swap out crankset to make room for Shimano power meter tests, existing chain is too short. Had to buy a new one today (will eventually put existing one back on when I get back to Europe).

  6. Paul

    What about the claimed six times stronger signal ANT+ from the latest generation compared to the previous?
    It obviously still have a limited signal strength compared to other PM.

    • Exactly why I’ve now got a small pile of Stages units sitting in my desk – old and new…tests coming up soon in another post (including indoor and outdoor signal and position differences).

    • Paul H

      Looking forward to reading about it.
      Is it possible that you include signal strength in all coming PM test?
      Maybe there is a advantage with rechargeable batteries vs coin cell in signal strength comparison?

    • Paul H

      I forgot.
      Do you know if the rssi value you showed is from 0-“-100” or from 0-“255”?
      So it’s related to dBm or not(I’m a WiFi nerdy engineer) ?

    • Just circled back to NPE on that one to find out. Here’s what they said:

      “The weakest value for RSSI would be -128. It is a signed 8 bit number.
      There is also a slight detail to have for reference: If you are comparing the values seen with WASP Util to values from a BLE scanner there will be an offset of 40. Since the original ANT radios did an internal offset for RSSI we chose to match the offset from the new Nordics so people would not get confused if they were using old and new WASPs together. BLE scanners on phones give the raw RSSI values.”

      Note that in my case I was using ANT+ for both signal measurement pieces.

  7. James

    Any insight into upgrading an older left only PM to the full left/right? You mentioned this briefly in the unboxing but didn’t come back to it.

    • Yeah, I’ve gotta get/find the full compatibility list. I believe then it’s as simple as just ‘linking’ the two via the app (you can see the link button in the screenshot in the review).

  8. Simon

    I have just started using a Wahoo Element, with Stages L power meter only. Will it work if add the LR system?

  9. Eric Boulanger

    Hi Ray,
    I have started using a Stages PM on my TT bike last summer and had horrible connectivity issues with my Garmin 500. So this year, I’m looking into ways to correct this. Should I consider a head unit upgrade (Looking at the Dash), or would the purchase of the crank side of the Stages LR be a more worthy investment? I am also pondering moving my head unit from in front of my BTA bottle.

    • I wouldn’t be confident just changing head units would fix it to be honest (especially on a TT bike), though, some folks have had better luck on Wahoo BOLT, specifically if they paired the BLE side.

    • Quite interesting Ray, I wasn’t aware that it was even possible to pair the Stages with the Wahoo BOLT. When I search for my stages on my BOLT I only see the ANT version, and I even reached out to Wahoo who said that they only support ANT for PMs, with only a few exceptions for PMs that don’t do ANT. Am I missing something?

    • By default Wahoo enumerates power meters via the ANT+ side first, since they know that by and large that produces better results from a compatibility standpoint.

      That said that change is semi-new, since they used to allow either/or.

    • “since they used to allow either/or.”

      So does this mean that they no longer support either/or?

      Back in January of this year, I got the following answer from Wahoo Support regarding whether or not you could select which protocol to use:

      “Hi Justin,

      Power meters tend to be much more buggy over Bluetooth due to a lack of standard protocols. That is why, with Stages in particular, the ANT+ connection is preferred. I will pass all of your feedback on to our development team, along with the request for choosing your connection type. Please let me know if there’s anything further I can do to help and enjoy your weekend.


    • Correct, they used to. You can see it back in some of my reviews actually of those devices.

  10. ooglenz

    Can you explain the following logic in pricing?

    Left only (2017) 399
    Right arm 650
    total 1049

    LR stages 999

    For what reason is the extra charge for customers who already bought the left only in the past?

    • I think the idea was to follow what most other companies do, in terms of charging a slight premium for not buying initially together.

      Though, if I remember correctly 4iiii did actually have a time period where they allowed existing customers to upgrade to right-side with a slight discount (that basically made it ‘even’).

    • dizpark

      >> if I remember correctly 4iiii did actually have a time period where they allowed existing customers to upgrade to right-side with a slight discount (that basically made it ‘even’).

      That was the promise, but AFAIK has not happened *yet*. Last time I inquired with 4iiii about a month, they said sometime later.

  11. Crash Bandicoot

    Wait a bit to order these. Several friends of mine got what is obviously the first run of dual sided PMs from stages and had nothing but drop outs and bizarre readings. I’ve got 3 stages blue label units and they’ve all been flawless for the most part but I know stages and seemingly every other PM struggles with their first run units being terrible (my experiences with Quarq, Powertap, and Stages)

    • The drop-outs is specifically the piece I addressed in the section titled “Does it drop?”: link to dcrainmaker.com

    • Nate

      I can confirm Ray’s findings on my Stages LR after one ride on firmware 1.1.8. Previous rides had shown 14+ dropouts on my Garmin 810 and Garmin 935. Moving the fan and putting the watch on my water bottle cage helped some on the old firmware but still got dropouts.

      On the new firmware 1.1.8, I tested the 810 out front of my tri bars, with a fan 3 feet in front of that, and wore the 935 on the inside of my wrist (which is how I always wear it while riding). There were no dropouts of power or cadence over 45 minutes of riding! Very pleased now!

  12. Suolla

    The firmware fix Ray mentions is not released to the public apparently

    link to support.stagescycling.com

    • tspahr

      The link above is to the release notes for the iOS app, not the power meter.

      Stages LR FW 1.1.8 release notes are found here: link to goo.gl and is live for download via the Android or iOS app.

    • Suolla

      Thank you. But the power drops are a problem for left-only units too. I hoped they would have a firmware fix for those.

    • Pieter

      I continue to see drops on the L only unit too. I ride a large frame (61cm) with an 820 sitting on an out front mount and see drop outs routinely. Stages reports only 40% signal strength when troubleshooting the issue. When I move my head unit to the stem the drop out improve. Not ideal.

      My next bike won’t have Stages.

    • The two specific firmware changes I noted above (in 1.1.8) are only going to the latest generation units, which basically means Stages LR, and Stages L (or R) units made after mid-January (they’ve gotta have that LED light on them).

      I’m not sure if the limitation is tied to different chipsets being used or what.

  13. Michal

    Is LR upgrade available only for new Stages L power meters or is it also possible with Gen 1 and Gen 2 units?

    • There’s a list around somewhere on which specific units are compatible for upgrade, I’ll see if I can find it again (and ensure it’s correct).

    • Brian

      I read this review and upgraded my stages left only 2017 firmware last night. It showed up as an option through the iOS app. Haven’t tested it yet. I had connectivity issues with the stages on a garmin 820 but my 510 worked fine with Stages most of the time. I did get some drop outs and erroneous readings in certain area of NYC. I also have power tap g3 hub and have never had any connectivity issues with it.

    • Brian

      Apparently I was mistaken. It seems I had missed a previous update for stages gen 2. It’s not the update that might fix the dropouts :(

  14. Ian S

    Nice review Ray, interesting that the old connection issue was back to start off with. The price point is interesting, I think they need to undercut the pedal systems by a smidge.
    Did I miss the unit weight?

  15. mech9

    I’ve worked in various bike shops since stages has been released to the public. At this point, I’d literally say that the return/RMA rate of stages is the highest of any single product i’ve seen. Not only do I not know anyone on their original stages, I know quite a few that are literally on their 3rd or 4th warranty. Even the “newer” ones just plain and simply do not work worth a #$^^. It’s like they are beta testing on the public. They are also starting to get stricter with their warranty, to the tune that we just point customers in other directions (quarq, pioneer). Next time you see someone with a stages PM ask them if that is their original.

    ok sorry for the rant. It just gets old. Maybe they finally figured it out?

    • Patrick

      I have had a Stages Gen1 Ultegra 6800 Power Meter installed since May 2015 on my Specialized Roubaix. The only problem that I had in the last three years was a loose battery cover. Stages support was responsive and shipped out a new cover, O rings and installation instructions.

      I have been waiting for Ray’s review of the Stages LR so that I can order and install it on my new Trek Emonda DuraAce Di2. Glad to hear about the 1.1.8 firmware to resolve some of the dropouts since also use a Garmin 520.

    • I think Stages was pretty upfront on the issues they had in their Gen1 units in terms of units dying, almost exclusively due to water ingest through the battery cap.

      From what I’ve seen, that’s gone down pretty dramatically with more recent units.

    • Michal Wozniak

      My 2015 Stages is still alive and kicking. Of course it has rather bad signal strength, it’s water resistance is almost non-existent and I had to ghetto-modify battery compartment to hold the battery confidently in place… but it’s still working and is as accurate as it can be (torque values are exactly as expected for known weight). The only specific thing I need to do to keep it alive is drying it out after wet rides. Yes. I remove the battery and let Stages dry like a pair of bib shorts or jersey.

    • Gen1 Stages owner here, and I too have hacked the battery compartment. Since the battery lasts for quite a while, easiest solution was electrical tape and a cable tie to ensure integrity. A lot less hassle than complaining about it, etc. I just wish my Edge 1000 was better at telling me when the battery is low… I don’t waste a data screen on it, and usually find out when I start reading zero watts.

      I’m nervous about investing in a R-only upgrade to my gen1 unit, though. It might be more cost effective, long term, to just get a new pedal-based dual-sided meter. That way the warranty clock is reset, etc.

    • Karoly

      Hi Ray,
      I’m on my second Stages (Left only) gen 2 power meter – previous returns related to water proofing of the battery cover and power dropping on my Fenix 3 and Garmin 800 devices. As far as the power drops, I gave in and simply use my Garmin 800 (which is mounted) and the power drops are tolerable (when compared to the Fenix). I’ve been riding inside on TrainerRoad for the last month getting ready for an early season IM race and noticed that my power levels seemed low when compared to my outdoor rides. Also, several of my buddies with similar FTP’s have all been riding TrainerRoad and reporting higher NP at much slower speeds (when we do the same rides). Today I switched TR to virtual power and compared the normalized power produced by TR vs. the Stages. TR generated a NP of 172 watts on a 2.5 hour ride, while the Stages generated 142 watts. I had done the same ride a week earlier and it was much tougher as I was holding close to 170 watts based on the Stages (and my heart rate data was much higher). The issue is that outdoors the stages seems to produce power numbers that are reasonable (based on comparisons with riding partners) so my indoor training numbers with the Stages are all but useless. I have read somewhere that Stages has problems indoors with interference from other electronic devices. Any suggestions? I am ready to give up on Stages.

    • Which trainer on trainerRoad?

      It sounds like you’re using Virtual Power, which is basically just an estimate (it can be good, or horribly bad, depending on a wide variety of things…in general, it’s not dependable though).

      Interference doesn’t cause lower power numbers – it just causes gaps in the recorded data. Depending on how you have your Garmin configured (to include zeros or not), those gaps can bring down the averages. NP gets a bit more tricky than that – but it too would be impacted.

      Are we talking a few drops for a couple seconds or less per session (in which case, negligible impact). Or frequent longer duration drops?

    • Karoly

      Thanks Ray,
      The trainer is a Kinetic Kurt Road Machine. Yes, using virtual power on TrainerRoad to compare against the Stages output (not ideal I know, but I don’t have a second power meter). There are maybe a dozen short zero gaps over the 2.5 hours (maybe 5 sec for each gap), but as you say the impact would be small. The NP and average power are virtually the same (e.g., Stages 143 avg, 144 NP and VP 171 avg, 172 NP). Just surprised by the magnitude of the difference. And as I mentioned, when I am outside the numbers seem higher. I guess I better start training harder…

    • Yeah, in that setup you’re likely to see pretty high variance on the KK and virtual power. A long time ago in a far away galaxy I actually did some fun tests on my Kinetic inRide review showing just how much the accuracy difference would be in that exact configuration.

      I’d stick with the Stages numbers, albeit they may be slightly skewed by left/right balance aspects, but not as much as the trainer numbers.


    • Perry Freidig

      Just get the Stages phone app, it displays battery life.

  16. Mike Alexander

    As usual Ray you have provided a great read! I love to see “if it’s possible” what the captured power reading differences would be with left only vs LR version for the average rider. I know that the LR is more accurate since it’s not just doubling the left power measurement. But what does that actually translate to in real life?


    • Funny enough, the DCR Analyzer links actually show this breakout. Though, I don’t have any automation now to show what things like Avg Power/NP/TSS/etc might do/change. Interesting idea to add.

  17. Giles Roadnight

    Hi Ray. I don’t suppose you did any tests to see if a helmet mounted camera can pick up the power data?
    Currently my helmet mounted Virb 360 doesn’t pick up my left only stages (it does if the camera is closer).

  18. Ash

    Thanks Ray, great review (as per usual!)
    +1 to the question on whether Stages are bringing LR out on their Campagnolo sets? Have they mentioned anything in your discussions re: this?
    Cheers, Ash

  19. Haykelb

    Hi Ray, surely crank based power meters are dead in the water for the general consumer and to release a dual sided meter at this stage in game seems like a bad move with all the pedal options on the market.

    Should we care about crank power meters anymore?

    • I think it’s kinda like everyone saying smartphone cameras would kill DSLR’s, or that Apple Watch would kill Garmin. In reality, both are now stronger than ever before.

      There’s a lot of people (a ton) who just don’t want a pedal based power meter. Some for concerns that are largely unwarranted, but some for legit reasons like different pedal types (like Speedplay).

    • Pavel

      There are literally no pedal-based options for MTB-type pedals

    • Brian

      The downside of pedal based power meters for a bike used in local racing seems to be cost of replacement or repair when the inevitable crash happens. That led me to stages for the racing bike. For my other bike without power I’ll probably wind up with pedal based power (garmin) due to using campagnolo and not loving stages so far. Powertap g3 was perfect for my winter training bike.

    • Jordan

      I don’t know any bike racers on pedal based systems since in criterium racing pedal strikes are common. Damaging your PM would not be good there.

      Personally I’ve also always ridden speed play and there is no pedal option for them, lastly swapping cranks between my road and tt bike takes no longer than changing pedals. It’s really easy.

      In short I see no reason to buy a pedal based power meter.

  20. slightest

    “if it quakes like a duck, it’s probably a duck.”

    where i come from, ducks don’t quake. unless it’s having a seizure. in which case it’d need to go to a hospital.

  21. Jeroen

    Hi Ray! Great review, love it! Any plans to review the new 4iiii Podium LR powermeter as well? Would love to see the two of them compared! Cheers!

  22. Ivan Nogueira

    Just a question, Ray:

    I have a Stages LR. If I click on “unlink” then I have 2 independent power meters(1 Stages L and 1 Stages R)?

    If this works 2 friends can save money buying a LR and separating it…

    • Ivan Nogueira

      I answer the question: Yes.

      Stages FAQ Page: “To use the power meters separately, repeat this process and select Unlink form the main screen”. Good news Here.

      Tha bad side… my Stages Power app crashes when I try to unlink (Android)

  23. Alex

    Is the data drop thing purely a power meter thing to stages, or a broader issue with some newer Garmin computers?

    I’ve been off the bike for nearly a year (injury) and finally got back and found my FR935 was constantly auto-pausing (set to “when stopped”) and recalculating the wheel size when auto-pause was disabled. I noticed my cadence was periodically 0, but doesn’t say that the speed cadence sensor connects/disconnects. I thought the sensor (Giant RideSense) was shagged, or at the very least the battery was. Neither a fresh battery or messing with the magnets made one bit of difference.

    After reading this article, it occurred to me that the FR935 is also new. My motivation to get back into running and cycling post surgery. So I grabbed my old Edge 510 this morning, and the problems magically went away. The FR935 on my wrist still had zero cadence from time to time, but the Edge did not.

    Could this be a problem with the FR935, and something Garmin may be able to fix with a firmware upgrade, or is is physical such as weaker receiving antenna or poorer transmission signal strength?


    • Generally speaking I haven’t heard of issues with the FR935 and connectivity (in fact, the opposite, it’s why people are choosing it over the Fenix 5 series).

      That said, when it comes to wrist watches of all types, they have an additional ‘layer’ to deal with in the connectivity realm: Your body blocking half of it.

      But as noted above, with Stages still being considerably lower than other power meters on the market from a transmission standpoint, one is more likely to run into the issue on a Stages unit than on other power meters. Hopefully the increase in signal strength on Stages side though should mitigate it for most situations going forward.

  24. How can I contact you to discuss a new product?

  25. Mike Bailey

    I have Stages left only units on 3 of my bikes. I think 2 of them were the first iteration, and the other is the second. I’m wondering if you think there is an advantage buying the whole l-r setup (due to improvements), or if I’d be fine just buying the right side to get dual sided power.

    • Eugene Chan

      The move from Gen1 to Gen2 was nothing more than a change in the plastic enclosure. The electronics were the same. The Gen3 or Stages L PMs are apparently 5g lighter, .5% more accurate and capable of measuring up to 5000W. The improved specs could be the result of firmware/software. The decrease in weight could be from process node shrinks and smaller PCBs. One issue that might come up is the chainring distance/pitch has changed with Shimano R9100 and R8000…I’m unsure how well the older 6800 and 9000 series front derailleurs work with the updated cranksets. I also haven’t seen confirmation that the Gen1/Gen2 units can by linked/paired with the Stages R units.

    • Sean Coffey

      I’ve had no front derailleur issues going from a 6800 crank to a Dura Ace 9100 Stages LR. No tuning needed.

      Also correct, a Stages R unit can be paired with earlier Gen 1 and Gen 2 Stages L models.

  26. Georg Thierry

    I’ve had a Gen1 for coming on 4 years now. Initially had the short battery life problems, but that was sorted after the new battery covers were introduced. No water ingress issues at all.

    However, early last year I started getting dropouts – on the Garmin 520 I’d actually loose all sensors, then a message telling me the phone disconnected, to be reconnected about 10 sec later. This only started happening when I’d started using Strava’s beacon. All I needed to do was turn off BT on my phone and no more dropouts.

    Now whether this linked to the Stages dropout problem or something going on in the Garmin BT and phone I can’t figure out, but others I ride with are experiencing similar problems, but not all use Beacon.

    • dizpark

      I don’t thinks this is necessarily a Stages issue.
      I have 4iiii Precision left crank power meter and Edge 520. If at the same time I had my Android phone connected to Edge 520 via BT, I also used to experience similar “super drop-outs”, when Edge 520 would lose all the sensors and the reconnect back. With BT off or phone disconnected no such drop-outs.

      I have not checked recently if this still exist – it might have been solved with one of the subsequent Edge 520 updates. Or it might be a BT ANT+ timing issue on 4iiii (similar to what Stages have recitfied), or it might be my specfic phone issue and the way BT behaves.

  27. JK

    Couldn’t find the info, maybe I just missed it, but if you buy the LR, could you pull the left side and use it as a standalone on a different bike if you needed to? I think an earlier review of yours noted that the left side was the “master”, so presumably, the right side couldn’t be used alone. Thinking about 1 power meter for road/cx bike, and moving 1 crankarm is much easier than changing chainrings and whatnot.

    • Eugene Chan

      From what I have been able to deduce, they will work individually. For the purposes of dual-leg measurement, the “L” unit becomes the master and reports the data to your Garmin/Zwift/etc. If you select the “R” unit as a power source in something like Zwift, it will only double your right-leg power.

  28. DrPeperino


    Have you ever managed to compare the different stages unit as i did in the post above?
    Have you noticed any difference/offset between them or can you confirm they are consistent and well paired alltogether?

  29. Alistair McLean

    Have you tried riding with it in the rain?

    I’ve had to send mine back four times because of water damage. it stopped working again after a damp ride recently and I’ve just given up.

    • DrPeperino


      I had humid and at times rainy rides with the road bike, and few muddy/rainy rides with the mtb and while I actually experienced some slight issues related to himidty in the battery compartment, they were all related to post ride moments: during the rides I always managed to get away with my power readings.

      I experienced problems which could let me take home the power readings but they were related to communication issues as described above (interferences or connection problems)


    • DrPeperino

      correct: I experienced problems which DIDN’T let me take home the power readings …

    • Michal

      Wet rides never killed my Stages. But… after hearing all the stories most of the times I used to put additional electrical tape on it and I always let it dry afterwards with battery cap off. Humidity inside the unit may cause overnight batter drain which may look like your unit is dead but, in fact, most of the times it’s not.

  30. Rich

    Chris Froome seems to be still using his 810 on his recent rides in SA on Strava.

    • Alistair McLean

      I wonder how many he has used? I suspect Team Sky have quite a few as back up. Still, no denying that Sky seem to think they work. Difficult to argue with that if i hadn’t had such a poor experience with them myself.

    • Dmitry

      I dont think 520 and 820 are better than 810. What important things can 820 that 810 cant on outdoor ride. trainer control is good but it is not very important.

  31. jerome

    Hi Ray,

    Thanks for posting this helpful review. I wonder what happen if someone want or have to change the chainrings on the Stages powermeter. Can he do that by his own ? What if the number of teeth is different ?
    I didn’t find the answer on Stages website but maybe I missed it.


  32. T Anderson

    Stages Android App issues:

    I have just fitted the Stages Ultegra LR and the hardware seems to be working fine.

    However, the App crashes everytime I try to Pair Left with Right. Am I the only person to experience this issue?

    I have used my Moto G5S phone and Samsung Tablet, both have exactly the same problem.

    • Nate

      I had issues with the Android app crashing while trying to link or Zero the LR. I switched to iOS (using an iPad Air 2, or perhaps an old iPhone 5? can’t remember…) and I still had some weirdness of being unable to complete a zero-calibration on one or both sides, but was at least able to unlink and relink my two sides successfully (I may have had to quit and restart the app).

    • T Anderson

      I contacted Stages and they said they are working on the Zero Reset issue.

      The Zero Reset does complete on my units then the App crashes.

      Being unable to link the two units is my problem.

      Everything else seems to be working. I was able to update the firmware to v1.1.8 yesterday. And the power reading compared well with Neo.

    • T Anderson


      I received a Beta version of the Android App and all is working now.

  33. Iván Nogueira

    Mee too. Android aporta crashes at zero reset or unlink button… I updated the Lr connecting individually to each one

  34. Iván Nogueira

    Has someone noticed the 1.1.9 update today? I’ve installed it with android app but no reference to it on stages web

    • Joseph Madden

      I got this update too. When it installed it said the update failed but the version number is showing updated so no idea what’s up with it. Also installed from the Android app.

    • Ivan Nogueira

      Now it appears on stages web. It says:

      Power usage improvement”

      Could it be more durable CR2032?

    • The specific change is actually that they increased radio power strength without impacting battery life. Obviously, that’s notably significant.

  35. Ole Lindtveit

    Hi Ray,
    I know you can buy the Stages L unit, and then buy the R unit as an upgrade and link them together to get LR. But is it possible to buy Stages LR, and then split it on two bikes, so you get L on one and R on the other? Would be a great deal, given the lower price on LR than on two L units.

  36. Marco


    I currently have a Stages L on my 2014 Tarmac SL4 Comp Di2, which uses an FSA Gossamer Pro BB30 on OSBB.

    I asked my LBS what needs to be done to be able to upgrade to the Stages Power LR, and I would need to convert to Hollowtech II using the Wheels Manufacturing BB30 to 24mm adapters. They say they have very good experiences with converting to Ultegra using these adapters.

    Unfortunately, I cannot upgrade with a Stages R only in addition to my Stages L on FSA, since the LR only supports Shimano at this moment.

    Would the Stages Power LR on the UItegra crank set be a good upgrade? Or should I prefer a Quarq DZero over the Stages in terms of installation?

    Bike can be seen here:
    link to specialized.com

    Also posted in “Quarq Dzero in-depth review” as I do not know which would be the better option.

    Thanks in advance!

  37. Tom

    Any power spikes? The absolute bane of my existence on my three g2 left only models over the last few years. Occur on rough roads when descending mainly. Left foot down bit of a bump and bam 1500 watts+ appear on my head unit. Edge 520. Interestingly I never had an issue with old 500, so units must process the raw data from stages a bit differently.

  38. Jeff Roth

    I’m trying to use Garmin Cycling Dynamics with Stages LR. Is full functionality available? I can get torque effect, L/R balance, and pedal smoothness. However, I can’t get Left or Right Power Phase to show up, or the PCO metric. Should they, or does Stages not (yet) work with those measures?

    • Correct, the power phase and PCO metrics are officially Cycling Dynamics and at present require Vector. Though, the standard is working it’s way through the right channels: link to dcrainmaker.com

      Still, even once they adopt it, Stages wouldn’t be able to do PCO since that’s about where your foot is on the pedal platform, so Stages doesn’t have enough data to make that happen.

  39. Jeff Roth

    I had the same experience – upgraded firmware today (day 1 with LR) and it said it failed. Opened the app again, and voila, there was 1.1.9.

    Anyone else having problems with the Android app crashing after calibration? Mine has done it every single time.

  40. Phil

    Hello DC R,

    Why haven’t Stages released a firmware update to fix the dropouts on the earlier Stages LH only units, perhaps an update to increase the transmitter/signal strength? I had a 1st generation unit which never once had a dropout but eventually succumbed to the water ingress problem. The replacement, a 2nd generation, drops out continuously despite Stages saying the only difference between the two is the housing/battery door. They recommended I mount it on the stem rather than on an out front mount. That does improve things slightly but who wants it there? My 1st generation unit was always on an out front mount and never failed. Is there a reason they haven’t corrected this common problem with an update?

    • My understanding is it’s chipset related.

    • Michal

      Was your 1st gen Stages completely dead? Just asking because water ingress is fixable most of the times. Maybe you shouldn’t get rid of well functioning 1st gen unit that easily ;) Better is the enemy of good enough.

    • Phil

      Hello Michal,

      It wasn’t completely dead but due to the water and rust etc causing a short circuit somewhere the battery eventually drained completely within 24 hours. Stages offered to replace it which of course I accepted. But the Stages 2nd Generation that replaced it has never worked properly, no water ingress at all but dropping out every couple of minutes or so. I find it hard to believe that the internals of both generations are exactly the same as Stages insist they are. The fact that it works slightly better when mounted on the stem than when on the out front mount indicates (to me anyway) that there is a problem with the signals range. Very poor from Stages.

    • Michal

      Ahh, I think you should have stayed with old unit. Battery drain issue is easily fixable most of the times. You can simply dry it out. Problem occurred in my old Stages 2-3 times but I always fixed it by leaving unit with battery cap open for 24 hours.

    • Phil

      I was doing that too but the water had caused rust to form a short circuit somewhere and after that no amount of drying it out was going to cure it. Within 24 hours a brand new battery was flat. Stages acknowledged water ingress was a problem with the 1st generation units and replaced it with a 2nd generation unit with a new door design. Well the new door design works but I believe they must also have changed something else with the internals leading to a weaker ANT signal, meaning it doesn’t have enough range to provide a good signal when the head unit is mounted on an out front mount. Many others have experienced the same problem and Stages have basically admitted there is a problem because they claim they have made the transmitter 6 times stronger with the 3rd generation units released a few weeks ago. I would be interested to hear from people with the new unit if it has indeed been fixed.

  41. Giles Roadnight

    The firmware update for my left only gen 2 unit has made the Power meter SO MUCH better. I used to have dropped connections more than I had solid ones I think. Now it works pretty much perfectly (very few times I look at Computer and see no reading. Maybe once per 16 mile commute)

    I didn’t quite follow the signal strength bit. Would a dual sided setup give me higher signal strength? I am thinking of my helmet mounted camera which at the moment doesn’t get any power meter readings.

  42. Dmitry

    Can i update my 105 5800 with ultegra lr 8000 or there is other compatibility requirements? Bb changing or something else.

  43. Todd Donovan

    The right side battery access requires removing two small screws and since battery life is relatively short, those screws could see a lot of use. Do they thread into metal inserts or into the plastic body of the sensor?

  44. Hsmash

    DCRAINMAKER would you buy this power meter or the Shimano power meter if you had to chose?

    • That’s easy: Stages LR.

      Aside from being cheaper, it’s more full featured:

      A) Stages had dual ANT+/Bluetooth Smart, whereas Shimano is ANT+ only today and unknown timeframe for BLE enablement (power transmission)
      B) Stages doesn’t yet have high-speed data mode on this, but that’ll likely happen soon. Shimano has no such plans at all.

      Now, one might argue that Shimano sends a better power signal, but I don’t think that’s much of an issue with the Stages LR to be honest. And again, dual on Stages, no-dual on Shimano.

    • Hsmash

      Thank you Rainmaker. So would you have any hesitation buying the Stages LR? I have some but it’s really only based on word of mouth and opinions, not data. I have a Riken Quarq today, but I want a unit that matches my Dura ace Di 2 on a new bike.

  45. JAVIER


    One advice: I have a 4iiii precision left power meter. Thinking about buying a dual sided power meter. Which one would you recommend me between the Stages LR Ultegra 6800 and the 4iii Podium one (given that the Stages costs 950€ and the 4iiii 999€, so no big difference). I think the Pionner version would be a great choice, but though adverstised as the same price (in $) I don’t find it at this price in € in Europe. Which one of the 2 (or the 3) would you recommend me.


  46. Ray, Having tested the L-only and LR units, can you quantify any benefit of having the LR over the L-only? Do your tests show the LR to be x% more accurate or y% more consistent than the L-only for someone with a 50-50 L-R balance?

    Also, do your tests show how well the L-R power variances track between the LR Stages and the L-R Garmin pedals over the course of a ride?

    Finally, how do the variances in power readings based on where the power meter is located – pedals, crank, spindle, hub – compare to the L-R variances between two different L-R power meters or a L-only and L-R power meter for someone with a 50-5 L-R balance.


    • The main benefit of any dual-leg (or total power) system over a left-only system is consistency and accuracy.

      The incorrect arguement a lot of people attempt to use with a left-only system is that “at least it’s consistent”, except, this is very much not true. And all of the information that we’ve seen in the last few years from dual-leg systems shows exactly that. Most people are not only not balanced, but also vary the balance across different power ranges.

      For example, I’m imbalanced at rather low wattages (i.e. 100-150w), and then I get steadily more balanced as I get to long-ride wattages (i.e. 200-250w or so). And then as I cross over FTP and into sprint wattages, I get imbalanced again. This is totally common. Except, people vary that. For example, as I get fatigued my balance shifts (thus, long ride impacts).

      The secondary argument people will attempt to use is that if it’s (Stages single leg) good enough for Team Sky then it’s good enough for them. Except that’s exactly what Team Sky didn’t say, in fact, they said it wasn’t good enough – which is entirely how the Stages LR came to be: Team Sky wanted a dual leg system after trying out the single leg system for just a single season. And since then, Team Sky has been on dual-leg units (for years).

      Certainly, having a single-leg power meter is better than nothing, but it’s not ideal either if you’re really focused on the data (which can easily swing upwards of 10% or more).

    • Ray, Thanks for your response. I understand the arguments. If you can help us better understand the data that quantifies the extent of the benefits that support these arguments, that would help us all make better-informed buying decisions. Perhaps as part of a future post…

      Power meter manufacturers quantify the accuracy levels of their devices (e.g., +/- 1.5%) and you nicely chart and quantify the gaps in watts between power meters over the course of a ride and at different points in a ride (e.g. hills, sprints, cobbles, temp changes). What I haven’t seen but would welcome you sharing is the wattage or percentage differences in accuracy and consistency between LR and L only power meters from the same models (e.g. Stages), from different models (e.g. LR and L from Stages vs. Assioma), from true LR, estimated LR (e.g. Quarq) and total power meters (e.g. G3), and at different locations on the bike (e.g. pedal, crank, spindle, hub, trainer).

      For example, how big are the accuracy results differences or what do the charts look like for a LR Stages vs a L Stages on the same outside ride or smart trainer inside workout? How consistent are the LR and L Stages and how consistent are the differences/results charts on trainer rides doing the same workout over 3 or 4 rides? How does all of that look for a LR Assioma vs a L Assioma? How do those LR and L Stages look against the LR and L Assioma and against a G3 hub or Quarq spider or Kickr trainer power readings for accuracy and consistency?

      This would quantify the magnitude of LR vs L differences in accuracy and repeatability within a model, between models, and between different locations on the bike. Knowing this would help quantify the cost/benefit ratio – the benefit of going to an LR over an L versus the extra cost of doing so.

      You detail and readers scrutinize prices. We can and do quantify the differences in costs. It would be great if we can better the differences in benefits.

      If for example, the LR and L Stages varied in accuracy by 3%, that’s a benefit worth the cost for Sky and probably Cat 1 and 2 racers but perhaps not for anyone else. If, however, the LR is more consistent than the L by 10%, that’s a big deal for anyone wanting to use a power meter for serious training. If the Assioma differences between LR and L are 2% on accuracy and 4% on repeatability, then maybe that’s too small a difference for most to see the benefit of paying more for the LR option.

      Finally, if the power meter readings and percent differences of the most accurate and consistent power meters you’ve tested at the pedal(s), crank(s), spider, spindle, hub, and trainer locations are less than the differences between LR and L power meters, great. If they are the same or greater, crap, that certainly adds another consideration into the buying equation.

      In other words, quantifying benefits of LR vs L vs location will help each rider determine whether the added cost is worth it or whether we are just geeking out and falling prey to technology and marketing hype.

      Thanks for considering my suggestion.

    • Joseph Madden

      While the accuracy for each power meter L vs LR vs Total may well be with in the tolerance of its own specific output (each side), the thing is a Left only simply doubles it’s value for total power. So if you are training consistently and your only bike or all your power meters on all your bikes are Left only you can use this to train for the most part. It’s not 100% as Ray said as your LR balance will shift on workout zones, but it’s better than nothing.

      Where you will have issues is if you have say one bike that is Left only and then another is LR or you are simply upgrading to a LR system. I recently went from a Stages Left only on my bikes to a Stages LR on my race bike, I have a pretty significant leg imbalance that I didn’t know about until I had the new Stages LR (about 54/46). Since my Left side is doing more work, my Stages L completely inflated my FTP so when I started using my Stages LR I noticed that my workouts were considerably harder for the same wattage. When I did another FTP test to make sure all was okay, the Stages L would say my FTP is 315 but really it was about 265. If I train on one of my older bikes now with Left only power, this is something I have to account for.

      What I believe Ray is trying to show in his testing and comparison charts is that if I buy X power meter that measures Total Power or LR power of Y, and another power meter measuring LR/Total power is the same, then I can be pretty sure that both are accurate and if I buy another powermeter in the future from one of those brands, that the results will be similar. This is needed if you are serious in your training as you need to be able to compare day to day, week to week, month to month and even year to year to see how your progressing. Because all my previous years training were on a Left only system and now I am on a LR, it’s really hard for me to compare how previous seasons of racing compare to this year as the numbers just don’t match up. I know I am not all of a sudden 20% weaker as my training and performance in races show the opposite. Its just now I have a much more accurate picture being on a LR system and I will have to use this year as a new baseline.

      Again a lot of this won’t matter to most people, its just about how serious you are with your training and goals.

    • Joseph,

      Thanks for your thoughtful comment. Agreed. You should use the same power meter on both/all your bikes if you want consistency. And if you have a pretty significant imbalance in the power coming from your left and right legs, then using an LR will give you a more accurate reading of your total power.

      Your point about imbalance suggests another question to add to the quantifiable task. How accurate are the power meters in measuring imbalance? If your PM says you are 49/51 is that within the tolerance of the PM? Could it just as easily be 50/50 or 51/49 and stay within that tolerance (of +/- 2%)?

      And then if you are 45/55 while warming up or doing a Zone 1 or 2 recovery ride and then closer to 48/52 or even 50/50 while in Zone 3 and above, what difference does it make? Other than staying within Zone 1 or 2 while doing a warm-up or recovery, there is little training benefit in being accurately within the middle of those zones or at the high or low end of them.

      Or lets you are never better than a significant imbalance of 45/55. The still unanswered question – what do you do differently if anything in your training if you are imbalanced? Other than doing rehab for an injury, I’ve not seen any training suggestions except still experimental ones from a few coaches to pros and Cat 1 or 2 racers that would cause you to train any differently. I’m certainly not asking Ray to answer that one.

      Being able to quantify accuracy and consistency differences of true LR vs. estimated LR vs L only vs location in the way I’ve laid out would help people determine which power meter to buy – all else being equal – knowing whether some form or model of LR provides benefits worth the cost. Without it, we are merely asserting or arguing LR provides benefits based on theory and personal anecdotes rather than data.

      Ray likely has more independently developed data than anyone to quantify the assertions or arguments he and many in the industry make. It would be helpful to put it out there to help buyers in their decision making.

    • Yeah, putting together a post showing some of the limitations of left-only units has long been on my list.

      It’s not so much a challenge of having all the – but rather, I have so much data that I’ve gotta figure out a way to consolidate some of it. Most of my data is focused on accuracy testing, which of course does really well show the limitations of left-only. But I don’t have it organized that way unfortunately at present.

  47. Ivan Nogueira

    Any news about 1.2.0 update?

  48. Pete

    I’d say the calibration is inconsistent because sometimes the stages agrees with the Tacx Neo, and other times (after recalibrating it) it doesn’t.

    Also the calibration numbers displayed in the iPhone app/Garmin head unit vary from one calibration run to the next. For example, this morning I took the bike outside, waited a while, and calibrated repeatedly 4 times. From memory I got something like 900/904, 901/901, 902/904, 901/903 at which point I just left it. I never saw that on my previous stages meters. Repeated calibration nearly always returned the same number on a given day.

  49. Pete

    I hadn’t seen this…

    link to support.stagescycling.com

    Notable improvements…

    More stable zero-calibration numbers. Users should perform a zero-calibration after the firmware update is complete.

    Improved left/right balance calculations.

    So ignore my last post ?

  50. Even Vangsnes

    I got the Dura-Ace LR a week ago. Worked perfectly fine the first ride. Then i downloaded and connected to the app, and the following day the wattage was way too low, balance was 100-0 (although both sides on and connected), and zero reset showed about 3300…
    Past days I´ve been just using the power from the left unit. Today the zero reset on the right side have gone down to about 2200.
    Do you have any tips? As it worked perfect the first ride, it should be a software issue and I hope it will either just fix itself or through a firmware update. Stages support has asked me to send it in, but would be fantastic to not need that.

  51. Pete

    That doesn’t sound right…I’d send it back. Zero reset values are way out of range.

    I updated firmware latest firmware yesterday (released 22/3/2018), and everything looks good now. Power matches Neo almost exactly. Calibration is consistent. Power balance is sensible.

    It’s a shame that Stages released this product before it was ready. The first couple of firmware versions clearly didn’t work properly. I think the latest version is production ready.

    • Even Vangsnes

      It´s just weird that it was functioning properly the first day, and suddenly after connecting to the app it´s way out…
      Right now the calibration is at 1900, so it´s going down…
      I think I´ll wait some more days and see what happens. This guy had a similar problem, and his unit was suddenly good again after travelling to mallorca. link to cyclingweekly.com

  52. Sergio Ruiz

    Hi. Thanks for your good article. I am writing from Spain. I bought us stages hard ace LR and on my first day of testing with my garmin 520 I was very disappointed because my garmin only connects to one of the potentiometers. I can pair the two but can only work with one or the other but not with both at the same time. I have done tests like releasing the leg of the one that is connected and power drops to zero. or even halfway through, remove the battery from which it is not present and the data did not change. only one potentiometer is working, multiplying the power by two but not how each potentiometer should be sending its power data. I do not know if this happened to you, that’s why it’s my question. the power data were coherent, 230w approximately rolling in level at a not too high rate. that is, a single potentiometer measures the strength of one leg and multiplies it by two. Can you help me in some way? thank you very much.

    P.S. forgive my English as a translator

    • Michal

      Check if left and right sensors are linked together in Stages mobile app. It seems like they’re acting as two separate power meters.

  53. Zach

    I just picked up the LR R8000 cranks for my cross and gravel bikes intending to use 46/34 chainrings. Meaning I’ll swap the large ring. However, I can not figure out how to remove the large chainring (50t) that came on it. I’m losing my mind thinking I must be on crazy pills here. The pod blocks the large chainring from being removed. Am I missing something here?

    • Zach

      Giles, thanks for the reply but I’m curious why you could not change to another size? Did you try and something not work? As long as you are using this or the previous generations Rings the bolt patterns should match. Stages support page States that you can use any of the common compact, mid compact, or full size chainring combos. It mentions that other sizes may or may not work, and I assume the limiting factor would be the Pod getting in the way. The 6800 series 46t had the same pattern but was much thinner in the traditional chainring style and just had some fake plastic caps to ramp up to the design of the cx ring to the crank. I was thinking of just shaving that part along with a little bit of metal if needed on the ring. At this point regardless of whether I can use a 46 tooth or have to stay with the same 50 tooth, my concern now is that I cannot remove the 50 tooth because the space is too tight from the pod to the chainring. This would mean that the whole power meter is a throwaway device unless I literally cut this chainring off once it’s worn out, and go to a bigger size that hopefully fits easier. Maybe I just need to really cram this chainring into the Pod as hard as I can to get it off but that’s really not something I want to do with such an expensive device unless I’ve heard from others first… Even then I don’t think I could remove it without damaging something.

    • I have Ultegra 6800 and have had both 52t and 50t chainrings. To switch between the two I had to change the chain set. A 50t chainring won’t fit on a 52t chain set.

    • Zach

      After a quick call to stages, they Emailed a PDF with the correct order of where to work the chainring off. They were really quick to respond. I eventually had to quit being afraid and just do it, but it worked. :-)
      I’m really impressed with Stages support so far.

      On a side note, now that I’m comparing my older 6800 series cranks to the R8000, I don’t think the big rings are actually interchangeable. As always, Shimano makes slight un-necessary tweaks in the design. I used to grind pieces of XT chainrings as a workaround but my road bikes need to be pretty.

  54. Giles Roadnight

    If it’s anything like my Shimano crank then you can’t change the rings for different sizes. If you bought a 50t crank then you need to buy a whole new chain set if you want to use a different size.

  55. Pete Nunn

    I was at my local bike shop yesterday trying to change a set of 52/36 for 53/39
    rings on an R8000 stages LR (for my TT bike)

    We contacted stages support and they have instructions. You have to apply significant force to clear the bolt holes on on the non crank side of the ring. To clear the other side you must remove the battery cover. I’d get the document before trying so your clear.

    Its a bit crazy to be honest.

    • Zach

      So I’m not crazy. Thanks! I put in a ticket with stages last night so maybe they’ll send me the doc…that should be included with the crank for sure, or in their help docs. If you happen to have a link in the meantime or a PDF and don’t mind sharing, zt Bishop ……at…… Yahoo d0t c0m

    • Darcy

      Did you happen to get the dock Zach?

    • Zach

      Yes I gave them a call and within five minutes it was in my inbox. I had to put my fears aside and just follow it but it worked. I put a 46 tooth CX ring on and it fit. It actually wasn’t difficult to put on because it’s much thinner than the road rings. However because of this I had to use standard chainring bolts backs as the already overpriced Shimano chainring did not include the cyclocross chainring bolt caps. The local bike shop ordered a set for $55 from Shimano. They aren’t entirely necessary but they helped make the chainring look like it goes on the crank. If you happen to need the PDF let me know. On a side note I did take a piece of sandpaper and took a little under a millimeter off of the chain guard on the ring as it seemed very close possibly touching the power meter.

    • Darcy

      Would you be able to share a copy with me?


    • Morgan

      In the same boat – any chance I could get a copy of the stages instructions? Morganbaynham@googlemail.com

  56. Peter nunn

    The bike shop have it I’m afraid. I’m sure stages will provide.

  57. Steven

    I am looking for a left sided power meter which I could upgrade later to dual sided.

    Looking at Stages Gen 3 and 4iiii any advice as to the best to go for.

    I live in Scotland so often wet and cold, bike stored in house.

    Is auto temp calibration needed?

  58. Nate C

    Anyone else having battery drain issues?

    I have a Stages LR crankset that I received only about 2-3 months ago. Last week, I noticed that the right crank wasn’t showing up in Zwift iOS on Bluetooth with the left (I always select the left crank) and I confirmed that only the left crank was sending data to my Garmin watch (balance of 100:0). I replaced the battery in the right crank after checking to find that it was completely dead. This brought it back to life and it paired with the left crank and everything was good in Swift and my Garmin 935 watch.

    Then, today, again I didn’t see the right crank on Bluetooth and my balance was 100:0 on the Garmin. I removed and checked the battery and it was dead on the right again.

    I had ridden a max of 2-3 hours since changing the battery on the right. The bike was on the trainer that entire time, so wouldn’t have been jiggled or anything else to wake up the PM. I am already on the latest firmware, 1.2.0. The battery cover is screwed in securely and has never been ridden in the rain or on wet roads.

    Could it be a firmware issue that isn’t letting it go to sleep? It is frustrating to keep going through batteries and missing rides because I realize the PM battery has drained again and can’t change it fast enough.

    I have a support ticket opened with Stages to see if they have any ideas but wanted to check with other owners too…


  59. Boris


    I have LR stages Powermeter and I’m not able to connect them at my Garmin Edge at the same time,so basically at the end of ride I have data only from either left or right side,it depends which side I connect.Is it possible for outdoor ride to connect both Powermeter on same Unit and get analysis?

    Many thanks


    • Michal

      Make sure that left and right unit are linked with each other as one power meter in Stages mobile app.

    • Boris

      Dear Michal

      Many thanks,I did as you said.It is working as one signal now,just there is no L ,R separated data in Garmin Connect.Is that case with you as well?


    • Mike Bailey

      Look for “L/R Balance”

    • Boris

      Dear Mike,

      I can not see any left or right individual data in Garmin Connect,while only one side Powermeter is connected that I can see for example: L72,R 0
      But not there is not at all L,R

      How do you mean Balance?

      Many thanks

    • Michal

      Yes, all ant+ power meters work like that. There is no two separate sensors to be paired. If everything is fine you should have power, cadence, L/R balance, L/R pedaling smoothness and L/R torque effectiveness data recorded and visible on Garmin Connect after the ride.

  60. Boris

    Hello Michal,

    Many thanks for good advice I’m able to see all data L and R.

    Best regards

  61. andy frank

    Lots of comments on various Online stores about these units not performing out of the box – as late as June 2018. Are these a few anomalies or are these Gen 3 Dual side units just not ready for the real world? Marginal response from Stages customer service also seems to be a common thread. every time i think i have figured out the right power meter for me, something comes up to scare me away. What are all you hearing?

    • Zach

      I have the L/R Gen3 on my road bike and one on my CX bike. I’ve had them for a few months now and haven’t had any issues with ANT+ to my Garmin, although I haven’t had a lot of ride time for various reasons. I’ve not tried BLE, as Garmin doesn’t play well with bluetooth (recent Garmin update may have fixed that), and ANT+ seems to have more ‘standard’ features for power meters. I was very worried about the L/R balance not reading the same between the two units, but once I started riding them both within the same day, I realized they do match up when I average the ride, and my form is sloppy as hell. So my balance bounces around but I’m certain it’s me, and my weak hip flexors, as the two bikes always average out to 46/54 and give me the same smoothness and torque efficiency readings. Under heavy load, on both bikes my L/R smooths out to 50/50, which explains why my mountain bikes with single side always read lower than my trainer until I reach FTP level output then they match (as my legs even out). This sort of thing is why I went double sided, so I can pay attention and try to correct some injuries. So I personally I feel that everything is working great and I am a happy camper (tho my wallet isn’t).

    • Fwiw, I recently added one (a LR unit) to my stable about three weeks ago and onto my main road bike, and have been using it on testing a bunch of things the last three weeks. been solid for me.

  62. Nate

    I have an LR that I got in about February, and I noticed an issue where the right crank is draining a battery every 2-3 weeks with only a few hours of riding, and also getting lots of error messages (-32) when trying to do a zero offset until one is successful from Garmin ant+ head unit.

    Ive found their email tech support to be pretty prompt and curteous in responding as I’ve done various resets and provided screenshots from their Stages app, and they’ve offered to set up a replacement, which I’m working on now.

    When it works, they make a nice product and when it doesn’t (I bought the LR as a discounted upgrade for an out of warranty Left-only crank that stopped working after 3+ years of use) they seem to go above and beyond some other companies I’ve dealt with, so I’m pleased about that…

  63. Giles Roadnight

    I’ve got a left only crank and have had various issues over the years and have only had very good experiences with customer support.

    I’ve had a gen 1, gen 2 and gen 3 am provided under warranty.

  64. Wojtek

    How large is clearance between left side power meter and chainstay? In other words – how thick is plastic case? I got Canyon CF SL Disc frame with Ultegra crank and distance between arm and frame is about 8,5 mm. In Stages’ FAQ they say you should be able to put 10mm hex to be sure PM will fit.

    • Morgan

      I’ve got the Stages G3 L/R installed on a 2018 Canyon Ultimate CF SL 8.0 – no issues whatsoever with clearance. On a 175mm crank at the closest point, there’s a good 4mm of clearance between crank arm and frame.


    Hi DC

    I see you ride with the Hammerhead Karoo, this is also my goto headunit how does your Stages R800 LR work with the Karoo any issues?

  66. Maximilian

    Hi DC rainmaker

    Could it be that the Stages LR does not really harmonise with a SRM PC 8? Any experience?
    I have got this combination on my road bike and the power and cadence is either 0 or all over the place.

    • Totally plausible, but deciding fault would be tricky. In most cases for compatibility, I’d wager that the PC8 would be at fault, since I know they simply don’t test it with most other power meters (had conversations about it with their engineering dept and founder last month). That’s fine, it’s targeted at the SRM power meters anyways.

      With Stages of course, there’s always the consideration of lower broadcast transmission, so that’s a potential factor – but unlikely with the LR.

      I’d so something silly – like stick the PC8 where your water bottle holder is for a few minutes and see if the data gets smooth. That helps sort out where it’s a transmission strength issue, or just a PC8 comprehensive/processing issue.

  67. Mike Bailey

    I have a hypothesis and would like you to weigh in on how plausible you think it is. It is that Left-only PMs can unconsciously bias a rider to become lopsided in effort. I have some personal evidence.

    I was on a Stages Left-only and got a new (not upgraded) L-R. My power on the Left-only meter was Much higher than on the double sided. And then I looked at balance, and it was about 67-33 (for most of my ride. Not for sprints, which were even). I have been more conscious of my pedal stroke and have gotten my balance back to maybe 58-42. (I haven’t been pushing over the top with my right leg as much as I should.)

    I was for a year or so in a gym that used trainers with power (non crank based), and back then, I didn’t notice a big difference between my Stages Left and my trainer power (though there was a bias for higher on Stages). So I think I may have changed after then, during the past 1-2 years. Have done intervals 2-3 times a week looking closely at the PM.

    Possible? Regardless, it was a drag seeing that my overall power was so much lower than I’d thought, and concerning that my power output was so asymmetrical. (I had started getting some left foot pain, which may have been related to greater stress on my left leg/foot.) I’m trying to change PMs on my bikes all to non-left-only.

    • MichalJ

      I was using Stages left only and Trainer Road in ERG mode (powermatch ON) last winter. Generally satisfied with the results, but also had an impression, that unconsciously doing more effort with left leg when riding “on the edge” trying to keep right power level. This may be subjective as I have no proofs excepting personal feelings during workout.

  68. Pete Nunn

    This sounds wrong. An imbalance like you describe suggests one of your legs doesn’t really work. You wouldn’t need a power meter to tell you this.

    I have 2 stages LR units and the first one has a problem with the R unit. It reports balance of 54/46 or sometimes 55/45 or worse. My other unit reports close to 50/50. Sometimes 49/51 in favour of right leg!

    I have a support ticket open with Stages but I’m pretty sure that the one reporting the imbalance is wrong because I’ve compared its data with my Tacx Neo.

    I’ll let you know what happens.

    • Zach

      Are the two bikes setup closely with the same fit? Or have you been able to see the same results swapping cranks between the bikes? My imbalance goes away it I’m up straight and don’t use my hip flexors (one was hurt long ago). I know it’s a Longshot but thought I’d throw it out there.

  69. Toronto Rider

    I just got back from a ride today and had nothing but drops with my Stages gen 3 dual side cranks :(.

    It’s been getting progressively worse the last few weeks. The crank’s batteryies are at 100% according to the stages app, and I have the latest 1.2.0 firmware.

    Here’s my crosspost from reddit:

    > Like an idiot I bought the gen 3 stages even after hearing about the signal dropouts. Today went for a ride and about 30% of the time my cadence and power weren’t showing on my Elemnt Bolt. It’s been happening the past few weeks but today was the worst.
    > I had figured that the 3rd gen things would be different, and also read in DC Rainmaker’s early review that it should be fixed.
    > The battery is showing 100% in the official stages app (which is also crap btw), and the firmware is the latest 1.2.0
    > Disappointed that a company can’t get it right even after 3 generations – at least I can return these for in-store credit and look for something new. Any recommendations?

  70. fiobe

    Hey, recently my Gen3 LR L and R started giving a 0/100 L/R power balance on my head unit.

    I did a quick check and I could see that the L side was not showing up anymore in the Stages app. So I replaced the L unit battery. Next thing I know is that somehow the R unit lost its factory configuration: ANT ID is showing up as “0” and it needs to be serviced by Stages! This smells like a pretty serious firmware bug!

    And this sucks since I just sold my old crankset so this does mean at least 2 weeks without cycling :(

  71. dan

    I may be looking at this a little backwards, but at the end of the day the only thing that matters is making the bike move forward. Now i only have powertap hubs until later this week when I receive the left only stages unit i purchased for my new gravel bike. My gravel bike can change between 650b and 700 wheelsets and I plan on using that feature. So to me powermeter hubs are out for now, especially since I want 32 hole rear hubs. Back to the subject. Since I do not have L/R power data now and I’m going to be on a much different terrain doing a different type of riding I do not care that my L/R balance is off nor do I care which leg is making the bike move forward. The ONLY important thing to consider is that the bike is moving forward. If this left unit is 10 percent off from my hubs or my kickr I’ll never know. So why stress over it.

  72. Alex P

    I was wondering if this can show power phase on Garmin unit in the future.

    PowerTap pedals can show something on its app. Assioma is going to support Cycling Dynamics. However, other crank arm power meter such as Shimano Power Meter or Pioneer Power requires a magnet to get power phase?

    How can power meter pedals figure out where the top-dead-center is?

    • I actually don’t know. I know that Pioneer could in theory (since they do it on their own app/devices/Wahoo units), which is roughly similiar to what Stages does. But I haven’t heard any details either way.

  73. Zach

    Has anyone had an issue with a firmware 1.3 changing their RIGHT crank into a LEFT?
    I updated via Android each side to 1.3 and they would no longer pair. I tried connecting it to iOS which tells me they won’t pair because they are BOTH left side!
    I updated my other bike, both sides to 1.3 before this without issues.
    I’ve raised a ticket with Stages but was just wondering if anyone else had this happen.
    Also, the latest Android app is complete garbage. It doesn’t even tell me if a crank is left or right, and will take literally 30+ attempts to connect to each crank and will not connect to two at once (need to pair through iOS now).
    I had no issues before the latest android app, it used to be smooth. iOS has no issues connecting.

    • Toronto Biker

      Agree with your Android app comment. The app is such a piece of Garbage I’ve had fresh graduate developers at my company capable of better than this. Couldn’t believe I paid $1500 CAD for these, they’ve been returned now (due to other issues such as giving 2000watts over 5 minute readings), and the service department said they’re not surprised a stages product is being returned.

    • Zach

      I just wanted to mention that Stages support was really quick to reply to me and get a new unit out, but it doesn’t sound like this has been known to happen; I’m guessing a fluke. I think that half the connection issues I ran into were the Android getting confused about connecting to two (now left) units at the same time. I have another bike with dual sided and my android does take a couple tries to connect to them simultaneously but it wasn’t too bad. My garmin and iphone have no issues connecting to any of them with ANT+ or Bluetooth and I’ve never had dropouts or inconsistent L/R readings so I think it was just an issue on the app.

  74. Michael Lüghausen


    anybody knows a mobile android app which shows any of the following data fields:
    ANT+ Power Balance (left/right)
    ANT+ Cadence
    ANT+ Pedal Smoothness
    ANT+ Torque Effectiveness

    The actual version of strava app only shows total power not even cadence


  75. Brian Butler

    Are there any clearance issues with the Stages power meter and the Canyon Ultimate cf slx?

    • Morgan


      I have the dual sided installed on mine – no clearance issues at all.

    • Brian Butler

      Well I had the crank arm installed today. It didn’t work. The power meter touched the chain stay. I don’t think that I have any opinions. The crankset is Campy and you can’t use a spacer to make it just a little wider.

  76. JS

    I have an issue with my power numbers with this same stages crankset. My Elite Direto trainer gives me about 20w higher avg power even though I’ve calibrated both my cranks and the trainer. My trainer is just fresh out of the box and my stages is about 6 months old. I believe there shouldn’t be so drastic difference and I can tell which one is not correct. Any ideas what could I do? Thanks!

    • KK

      Hi JS,
      I am having a similar problem with my Stages LR when compared to my Wahoo Kickr for indoor training on Zwift or TrainerRoad. The right crank is generating power that is about 10-20w lower than the left and the average weighted power is around 8-10w lower than the Wahoo Kickr. I’ve used DC’s analyzer and have sent the power files to Stages and they agree. They sent me a new power meter and I am having the same problem with the new unit. My latest correspondence with Stages tech was not very helpful – they basically said they agreed that the right side was producing lower power and that one option was to just use the Stages PM instead of Wahoo for my indoor training. I’ve tested this PM with several different head units and with Zwift and TrainerRoad and the results are pretty similar. I realize that as long as the Power Meter is consistent I can use it for training, but when you spend a $800 on a dual power meter, you expect the company to live up to it’s accuracy claims (+/-1.5%). I’m curious if others are experiencing a similar problem and if it could have anything to do with installation, the latest firmware, etc. or did I just get two lemons in a row?

    • CK

      I have the exact same issue with mu Ultegra R8000 LR. It was always reading about 5-10% lower than my kickr. I contacted stages and they asked me to compare as L only and as R only. As L only it is spot on with the kickr. As R only it is reading about 15% below the kickr. Waiting for their response now (they have been great communicating so far), hopefully this is an issue with a few units only and they will provide a fix.

    • Michal

      I’m afraid this is an issue with all Shimano crank arms based, glued-on power meters, not only Stages (so Pioneer, 4iiii and even Shimano’s own power meter).

    • Petr Steiner

      I have opposite problem, when I am going Z2 ride, then I have inbalance L46% and R54%. When I am going some efforts Z4 and more I have L50% and R50% . But with my Quarq on MTB I have almost everytime 50/50…

    • dizpark

      Except CK’s left hand side unit which is also glued-on appear to be spot on. Are you saying it is a common problem with drive (right) side glued-on power meters?

    • dizpark

      AFAIK Quark is not a true double sided, it ‘guesses’ LR ballance

    • Michal

      Yes. The right side is the problem. You are better off with left-only version because right side seems to mess everything up.

    • Michal – If you’re still reading these comments. Please shoot me an email gplama @ gmail dot com. I’m digging into this exact issue with Shimano based LR power meters at this point in time.

  77. Brady Reed

    Curious if you can split the dual sided into two separate power meters? I believe you can do this with pioneer but not sure for stages.

  78. George Wilson

    You noted that you had dropouts on the 520 before 1.1.8 but not on the 1030. Since gen 2 units didn’t get 1.1.8, can I assume that a gen 2 unit would still be able to work with a 1030 without the outfront mount dropout problem that plagued the 820/520? I’m looking at picking up a 1030 to go with a gen 2 stages, but want to make sure it will work first

  79. Michael Grayson

    Hi, I just purchased a Stages Gen 3 PM LR Ultegra and had it installed by my LBS, but I’m having an issue with the right side power reading dropping to 0W after approx 10 secs of riding. The data is being displayed on my Garmin Edge 1030. I have the latest firmware on the Stages and on my Garmin. I even replaced both batteries even though the Stages IOS app indicated good battery health.. no change.
    I linked both PM’s using the app and successfully calibrated using my head unit.
    Any ideas?

  80. Ihsan

    With all that I’m reading, this is probably a moot question but inquisitive idiot in me would like to know.

    Is it possible to use the R8000 stages LR with an old 10 speed Ultegra (6750) group set?

    Most likely I’ll get the Favero Assiomas, but I’m a little too much attached to my SPD-SL pedals.


  81. Ihsan


    That still leaves the question of “is it really worth the extra $350, and loss of ease to move between bikes just to keep the SPD-SL pedals?” But it is good to know I can make this work if I reaaaally can’t let go of my Shimano pedals.

  82. Nate

    I timed myself the other night just for the sake of knowing and I swapped my power meter crank from tri bike to trainer bike in 5 minutes total. Once you’ve done it a time or two, it’s really easy. For Shimano cranks, losen the two pinch bolts and then remove the plastic tightening cap, drop the chain and remove the left then right crank, reverse the steps on the bike. It might even be faster than trying to remember which way to rotate your pedals when removing/installing. (I’m a speedplay person though would still consider a speedplay pedal based meter for traveling without a bike).

    • Ihsan

      Thanks Nate,

      My problem is that the cold weather/beater bike is an older steel bike with 9-speed groupset. I’m fairly certain the r8000 crankset won’t work with that one :)

    • Nate

      Yeah, good question. Based on some online searching, it looks like you may still be able to mix 11 speed crank sets with 9 speed groupset since the pin to pin spacing and inner pin width is the same–the problem comes when you try to use a 9 speed chain (thicker on the outside) with a more narrow 10 or 11 speed derailleur. Or mixed shifters with the wrong derailleur/cassette for indexed shifting because the travel distances vary.

      link to velonews.com

      Good luck with your choices!

    • Ihsan

      Thanks again!

      I think I should just let go of the attachment to SPD-SLs, buy the Favero and save $350 over the Stages LR. :)

    • Andy

      I’ve been using SPD-SL for six years and I do a lot of climbing in SoCal, sometimes 8-15% x 3-4 miles (Mt Baldy Ski Lift). The transition to from SPD-SL to Favero’s Look pedal has been an extremely difficult one, particularly at low cadence. I tried multiple styles of Look-compatible cleats and various cleat positions and finished a century ride. But the Faver’s pedals just never felt the same, probably because they’re ~1/2 in narrower than the SPD-SL. I’m switching back to SPD-SL and in the market for a new type of power meter.

      Favero Assioma is a decent power meter. But personally I’ve decided to stick with the SPD-SL.

    • Ihsan

      Thanks Andy,

      That’s my biggest worry. I’m quite attached to the SPD-SLs as well.

      I guess I’ll find out soon enough. My assiomas are en route apparently.

  83. Zach

    I have Stages on all my bikes. Single sided on my mountain bikes, Dual on my road bikes.
    For the most part, they (all) usually calibrate around the 870 range.
    I had the drive-side on one of my road bikes replaced under warranty.
    The replacement Drive-side calibrates 950 (much higher than all the others) if I do it alone.
    So the left = 870 (the original left side)
    The right = 950 (since the replacement).
    -Once I connect the two sides together and calibrate (left side pointing down) – the calibration number is simply given for the left side (870 range) when I calibrate the dual setup from my Garmin.
    I can’t tell any obvious issues – however, should I be conerned?
    Meaning, if the offset on the right side replacement was much higher individually, is this calibration from my Garmin actually calibrating “both sides”? Does it calibrate both sides and simply display the left only calibration and set the right side behind the scenes?
    Or is this only calibrating the left side, and then set both sides to 870 (the left side #) (in which case it would throw the right side way off).
    I can’t tell any obvious issues; just wanted to make sure that shouldn’t be a concern.

  84. Gee

    Evening, Great review! a question about the Fenix5x connectivity….. what are the issues that you found with it please? Cheers Gee

  85. Kuno Würsch

    Hi, thank you for all the reviews which are very helpful. Based on your review I have recently purchased the LR Ultegra cranks. Probably under an unfortunate star as one of the power strips got loose and had to be fixed only after a few weeks.
    In all my years of biking it happened now that my pump attached to the frame got loose somehow and managed to find its way down to get caught between crank and frame while pedaling destroying the left powermeter.

    Unfortunately, it is not possible to repair the left crank – would need to buy a new one.

    Finally and maybe the most annoying part about stages is that their software comes only with an annual fee which I find exorbitant given other free software solutions. And their standard without premium is not even showing all the data of a given ride especially around power is really annoying. While I am sure they are collecting all the data happily in the background for their purposes.

    Cheers, Kuno

    • Ted Hohl

      “…part about stages is that their software comes only with an annual fee…”

      I believe you mean “Strava,” not Stages as for premium (aka, Summit). Stages software is free.

    • Kuno Würsch

      well, stages-link comes at a monthly rate of 20 dollars or 199 a year… if you want to have some sort of meaningful readouts…

  86. Mike

    I just installed the Stages LR on my road bike, curious if it makes any difference to zero offset each side separately with the crank arm at the bottom, or do the offset for the pair but with whichever crank arm randomly at the bottom? Which approach is technically ‘correct’?

    • Zach

      I want to know the answer to this as well. my L/R sides used to both have similar numbers until I had to have the drive side replaced. How they have wayyy different calibration numbers. If I have them tied together and zero with the Garmin head unit, I put the left side down and it zeros it out with the number in the Left side range.
      –Does this mean it’s applying that number to both sides? Because if so, that would make it WAY off for the right side. Or does it calibrate both and just not display the right side’s number?
      I can’t seem to get an answer on this anywhere, and it leaves me wondering if I am getting good or bad data, or if it’s throwing the L/R balance readings off.

    • dizpark

      And I would be curious as to what the Stages tech support advice is on this. Have you inquired with them? Don’t have Stages products, so have no experience with their tech support. Is it that hopeless? :-)

    • Nate C

      I’ve been wondering about the answer to this as well- I’ve always tried to independently calibrate the left and right sides by connecting only to one side using the phone app and choosing to calibrate, but it seems that it still sends back calibration values for both of the linked cranks, and I would expect that the value for the crank which is not at the 6 o’clock position is off.

      I also have a Pioneer Dual crank, which allows me to “calibrate”/zero-offset the two sides independently, and on the calibration screen, I can see that the 12 o’clock crank is not reading 0 N for the Tan and Rad items (usually 1N different) when moved from 6 o’clock to 12 o’clock when zero-offset calibrating the other crank.

      I’ve had good communication with Stages support (including replacing an out-of-warranty left crank with discounted dual, and then replacing the right meter which was draining battery) but haven’t tried contacting them to ask about this issue.

    • Michal

      Hmm, this is really interesting. I’ve never observed difference in zero offset between crank arms being in 6 and 12 o’clock position (I mean left only). Maybe make sure your bikes are not leaning on any side.

    • Mike

      Thanks for pointing out the obvious @dizpark – link to support.stagescycling.com

      I swear this wasn’t there before posting… oh wait it was. Anyway, seems the simultaneous vertical calibration is the answer, though I will probably vary which arm is up just on principle. Presumably the calibration uses some weighted average of the most recent few zero-offsets to adjust for random variability?
      Anyway, super happy with the Stages LR power meter after 3 weeks now, just works, wakes up and connects fast and reliably, great to see what I’m pushing. I’ve also had a nagging right leg issue for years, the L/R balance metrics are great to see and clearly distinguish when my leg’s ‘normal’ vs a little worse off (as it has been this past week)!

  87. Amilcare

    Hi, I was wondering whether any of you tried the Stages L/R (or even just left) on a Trek Emonda SLR frame. I’ve tried to contact directly Stages but they were unable to provide a clear answer. They suggested doing the clearance test with a 10 mm hex wrench. I did it and do not think I’ve 10 mill (perhaps 8mm) but at Stages firstly seemed relaxed but than when asked again felt less so. I”m currently using a garmin cadence sensor 2 and I’ve clearance. this leads me to think also the stages should work but happy to hear views!

    Thanks in advance


    P.S. i’m also dwelling whether to buy the Ultegra or the Dura ace version. I’m currently on ultegra, so do you also know if i could use my former ultegra chainrings on a stages dura ace?

    • Michal

      I’ve seen Stages one Emonda SLR, like here: link to ridethestory.com

    • Nate C

      After seeing Keith Wakeham’s YouTube analysis of how all Shimano crank-based power meters can’t obtain accuracy with right-sided numbers due to the asymmetric 4-arm design (GPLlama also reported in this), I’m second-guessing my Stages/Pioneer dual ownership. Maybe look at the assioma or Garmin pedals?

    • Amilcare

      Hi Michal, thanks for the reply and link: it sounds promising, though the guy had a 54 frame (I’ve a 58, apologies i forgot to mention it!). Waiting also other replies and trying myself look on the internet for other example similar to the one you kindly passed to me. thanks again!

    • Amilcare

      Hi Nate, not sure if you were replying to my question bur, as far as I’m concerned I’ve ruled out pedals: in my opinion they are too much at risk of braking in the event of falls or any contact being one of the most exposed parts

    • Amilcare

      Just for the benefit of other possible readers, i’m very happy to confirm that the Dura Ace version of the Stages L/R fits perfectly on my Trek Emonda SLR 2019. thanks again to all who helped on the issue”!

  88. Onno

    I just got a Stages LR, and noticed I can enable/disable the use of its gyroscope for cadence in the Stages app. Any idea why this is optional? Are there any downsides to enabling it?

  89. Marco V

    Do you know if, calibrating the LR set using a Wahoo Bolt unit, will calibrate *BOTH* L and R? That’s because, typically, only the L side is connected to the computer.

  90. Joffrey Lenoir

    @DCR :

    You should really update the accuracy part of this review to include the concerns about accuracy for shimano crankset based power meters (not specific to Stages).

    I have experienced the same things as Shane Miller for example (compared Stages to Favero/Vector/Tacx Flux).

    Left unit is fine, right unit shows lower values … wish i had known this before i bought it ;-)

    • Thomas

      I’d be interested in the DCR take on this as well. He hasn’t seemed to notice these issues in his testing of Shimano-based meters. I was about to go all-in on a used Gen3 Stages LR until I saw Shane’s report and I don’t know what to do now. Surprised I didn’t see more comments about that here.

    • Joffrey Lenoir

      My strong advice would be not to go for it.

    • Yup, Shane and I have talked at length about it (including on the Podcast). It’s definitely a challenge, though, it should be noted it’s specifically a challenge on newer R8000+ cranksets, and not actually older ones prior to that generation.

      In my experience with the Stages LR over a longer period of time, it’s harder. It’s not as clean cut as it works or doesn’t work all the time. I suspect there’s an element of pedaling style that plays into whether or not the R8000 (which the Stages LR I tested, and another I bought) responds positively or negatively. Which meshes with everything we know about the issue. As seen above, I’ve had a lot of good data from it, but if we go beyond this review over another year’s worth of data, I’ve also had a few rides where it’s like ‘Huh, that’s weird’ – and can see the separation.

      It’s a good idea to add a note in here on accuracy updates in the nearly two years since the review though.

  91. Claudio

    Hi and thanks for your great job. I have a question: i bought a left stages powermeter and also a tacx neo 2t. I found that the stages read always 15/20 Watts more but when i pedal en danseuse It read less Watts than the trainer. I try to verify possibile imbalance but using the tacx I found that i’m 50% exactly. I think the difference is to higher so I’m asking you if you found this discrepance and if a double pm can help (also if GP Lama suggested to avoid Shimano crank pm). Thanks for answering

    • Joffrey Lenoir

      I don’t think a double sided would help in this case since it’s the right side that provides wrong values.

      A “left-only” unit should be quite accurate if we take the assumption that you provide 50%L and 50%R power with your legs.

    • Claudio

      Thanks for tour answer. Hoping that tacx balance is correct. Anyone sperimented same issue? 15/20watts of difference meanse also a FTP uncorrect.

    • DrPeperino

      I have 4 different power meters, 3 P2Max and 1 Sworks power, plus the one on the Direto trainer. I frequently ride outside with a friend of mine that has a 2 P2Max on two different roadbikes and one of the MTB (previously the MTB was fitted with a Quarq).

      Result: 15-20W different between two different power meter sensors are extremely frequent. I tested mine against the Direto and all of them read different from it. I tested them against the reading of my friend and discrepancies are always there.

      The only solution I came up with up to now is that you have to understand how the specific unit is reading and then compare its values only against itself. Comparing with other units as if readings were absolute and comparable across different PMs will most probably be misleading.

      Just to clarify: the doublesided option is not helping at all. It is a power meter with 2 sensors. My Sworks power meter is dual sided and the two sides are not reading equal (when I ride one leg at a time, the left side never reaches 100%, meaining that the right side is reading some watts even when the right leg is not pedaling……..).


    • Claudio

      Ho Luca and thanks for your kind answer. I accept what you describe but I think that two powermeters are sold with a 1.5 tolerance theybshall read the same measure otherwise ther is somerhing that i can’t understand. If we both use a metric system and we build an instrument It must measure the same. In any case i guess i have to accept. Thanks again!

    • DrPeperino

      Me as well I always struggled to accept the factual evidence that 15-20 watts difference are there between units (even of the same manufacturer).

      Tolerance is only a marketing message, they won’t take any claim based on tolerance. Any action done in accepting my quarrelling on tolerance (or out of tolerance readings) was just an action of Sales goodwill

      The problem is that they don’t tell you what are the condtiions at which that tolerance is granted. Basically they do not grant it, they just claim it.

      Still good power meters are consistent with themselves: they might read 15 or 20 more or less than another unit, but as long as they are consistent between different rides, that makes the power meter usable. You just have to know what to expect from your unit and then take it as a relative value rather than absolute. It’s comparable with itselft over time, not with other units.

    • Claudio

      Ciao Luca really thanks, you clarified very well the situation. In any case I still will consider not real those informations released by manufacturers. Have a nice day.

  92. Ben

    Added auto-zero functionality for smart cranks.
    link to manuals.stagescycling.com

    Does it mean I no longer need to calibrate it manually?

  93. Thomas

    I was using the gen 3 dual sided PM for less than a year now and about 2 weeks ago it started to get wrong readings. I think it is the right side and it up to 50% lower than my actual watts and completely differs my left side as well. This PM has become completely useless. Has anyone had similar issues? I changed batteries, did zero reset, hard reset, updated firmware and tested vs kickr multiple times with the same results. It used to be really accurate and consistent with the readings before though.

    • Jeff Roth

      Thomas, Have you seen a change in the calibration results? I had a similar problem about a year ago, and I noticed that the calibration measure between L and R had widened to about 50 points. I called Stages and got an authorization to send the PM back to them for service. Took about 10 days to get the PM back, and they fully fixed the issue. BTW, it was my R meter as well.

    • DrPeperino

      Same here. I didn’t have the specific symptoms you are reporting but I shipped back and got back replaced as much as 7-8 stages units over the last three years. Same happened to a friend of mine, two stages = 4 units replaced.

      Their customer support is superb, they get back very quickly and they gernally replace and ship back to you the same day they get your unit. Just a couple of preliminary checks via email before you ship back and normally they have you covered with a refurbished unit in equal/better conditions than the one you shipped back.

      I had to give up with stages because I couldn’t stand anymore shipping back one stages unit per year at least (as I had three, on three different bikes………).

      other friends of mine didn’t experience any issue at all and were very happy with the brand and model. Might be dependant on how picky you are on the abnormal readings/situation you experience, an/or how you store and how much you use the bike and thus the unit.. don’t know.


    • Thomas

      Thanks for your input Jeff! I tried to contact them now and see what they respond. Unfortunately I bought the PM in EU but live in Australia so the distributor here is not willing to help out. I hope stages may be able to help me. Do you know what they had to do to get it work properly again?

    • Jeff Roth

      Hi, Thomas. They ended up sending a replacement right side meter. I recall them guiding me through some easy diagnostics that showed it was defective. I am based in the US, so I can’t speak to their global support. I hope that they’re helpful to you.


  94. Thom Nash

    I got a pair of Rally XC200s for Christmas and when I paired them with my 1030 Edge they showed up as Vectors. Is this normal?

    • Hmm. That’s super odd. If they are legit Rally, they should show up as Rally, not Vector 3 (at last in the sensors menu). I assume your Edge 1030 is fully up to date?

      The only off-hand scenario I can think of is perhaps in some odd settings menus maybe? A better question would be what they show up on within Garmin Connect mobile.

      Either way, all probably better questions on the Garmin Rally post than the Stages LR one. ;)

  95. David Heleg

    Have you done any testing on this dual power meter with AbsoluteBLACK oval rings? Any thoughts on whether it affects accuracy?