UPDATE Review of firmware 1.2.0 HERE: th-cam.com/video/q8oqrh4G8PE/w-d-xo.html This updated firmware resolves most of the issues identified in this video!
I have an older gen 4iiii single side on my winter bike - it's never missed a beat. I guess I feel the need to defend 'good enough' power data where the use case makes spending a lot more hard to justify. That said, I do appreciate your attention to detail
I’ll be sticking with my earlier Precision 2. I keep meaning to test battery life (using Strava gear record) but I’m confident I’m getting way over the 100 hours quoted. Battery door has been reliable at keeping water and dust out entirely.
If you want to safe battery on Precision 2, you have to turn off the cipolo tracking. I asked the support and they send a new firmware to my 4iii app with cipolo tracking disabled. Very fast and easy support!
@@dakalla thanks. I might ask them about that firmware. Although I’m having no issues and battery life isn’t worrying me so inclined not to try fixing that which isn’t broken!
It is crazy to be forced to buy an older version of this PM due to the fact current model is not able to update necessary firmware to remove identified weakness. Thx. Ralf
Glad I ordered the precision 2 as a factory install for my 8100 crank. I didn’t see the appeal of the precision 3 even without these test data. Only advantage is the longer battery life and lower profile. But overall I think the 2 is the better powermeter. No issues at all, battery life is good enough and it has chipolo tracking.
Apparently they just released the new public firmware update 1.2.0. I will be trying to update tomorrow and hopefully it will switch from my current beta version to this new public firmware. Some notes I received: Here are the release notes for firmware version 1.2.0 Realtime Terrain Auto-Optimizing Firmware update: Specifically developed to guarantee optimal performance and unwavering accuracy across any riding surface. Uses the accelerometer for exceptional battery life on smooth steady state cruising and automatically switches to the gyroscope on rough terrain, gravel or for the high RPM sprints. Improved cadence reliability for buttery smooth power measurement. Instantaneous startup and transitional responsiveness for those sprinting from 0 to hero, up to 220 rpm! Industry dominating battery life on a coin cell. Other improvements over firmware version 1.1.0: Power and cadence accuracy Power and cadence delay Power and cadence smoothness Cadence drops & spikes Connectivity Missing power peaks on short sprints (under 8 seconds) With two patents pending for new technologies developed, the PRECISION 3 firmware update 1.2.0 will be available for all PRECISION 3 owners starting March 30, 2023 via the 4iiii app. More details on the specifics of the firmware, testing processes, and future innovations will be hosted on 4iiii.com’s blog page.
Is it performing better with this software update? Please do a review! I don’t feel like spending $1000 Canadian (in addition to my head unit) just to get those data. If the $500 will do it’s job okay, I am gonna pull my trigger…
I just bought a 4iiii Gen 3, it's my first power meter, and also didn't want to spend too much; I hope future firmware updated solve some of the issues you mentioned. Anyway, for zone training and having some data I believe it should be OK. Also mention that power meters are being difficult to find, probably because of the chip shortage issue. Thanks for your honest and detailed review.
@@colormythingy I've been using for about three months now and did not have any issues. Only issue I had last week was it didn't record the power for my ride, only cadence, but with a simple calibration it worked OK again.
Quality tech journalism. I have just put a 4iii on my mountain bike specifically to assist with pacing long rides so I'm less bothered about these inaccuracies but good to know it's limitations.
Just for some balance in the comments. Previously I was running the second gen 4iiii precision on my road bike. No issues. I am still running 4 units of the 4iiii precision 3 left crank power meter. On three different mtb and on my road bike. I had to return one unit straight out of the box because it was faulty from the start but otherwise all units have been running without issues for the past year. On my request 4iiii pushed the beta firmware to my devices and I have no issues with dropping or lagging data on my garmin 830 and 1040. I am running the second last beta version. Waiting for 4iiii to release a new public firmware update. And of course waiting for the detailed tests.
I always assumed I’d get a single sided power meter due to price but then had a rush of blood and went dual-sided. I’m glad I did because it turns out I’m as much 55/45 Left/Right imbalanced and a left sided meter would have been flattering but inaccurate for me!
TRUTH! I am 45/55 (L/R). I have several bikes with Stages L-side. As a result, I can only use L-side only numbers when training, despite having other power meters, including L/R pedals on other bikes. It sucks.
Thanks for confirming my thoughts on this power meter. Having purchase one when they were first made available I immediately noticed that it did not track like the Tac Neo2 or Assioma's when compared using data from Zwift rides (lower high end power and then the power would drift up and exceed the Assioma's after 30mins.) on Zwift Power. Even with the new firmware it's still drops cadence (80ish rpm) and loses signal to the Garmin 830 head unit. Since this is now on my gravel bike It'll be a while before I retest the meter's performance with Zwift data.
Thank you for a very nice review. I've been thinking about this power meter for about the last 3 years and finally bought a Garmin Rally 200 for the new gravel. I can change Rally pedals between bikes more easily than cranks, and Garmin Rally provides me with many more useful metrics. The price for a two-side solution is similar.
@@enotracoon9244 My choice for two-sided Garmin was more useful metrics for Edge and Garmin Connect to evaluate and improve pedaling techniques. Maybe even today I would only have basic SPD pedals if the price was decisive.
I'm so excited about the functionality of the Garmin Rally 200 that I finally bought another Garmin Rally 200 set for the second bike, instead of exchanging it between bikes.
I've owned a few power meters. The previous gen 4iiii was both the most accurate and also the worst quality PM I've ever had. The strain gauge failed after 20 months; zero watts but accurate cadence. 3 riding friends all had the same issue, all at the 18-24 month period. Looking around the net, it appears to be a surprisingly common issue. Its a real shame as, when it worked. the PM was very accurate and clearly had good firmware which avoided some of the crazy power spikes of competing brands. 4iiii will ask you to replace the battery etc etc but they know what the issue is.
Seems like 4iiii’s has the strain gauge dialled in but the cadence issues are weird, especially since the Assioma’s cadence sensing is dialled in. That said I’m happy with my 4iiii 105 Gen 2. The accuracy trade-off is proportional to what I paid for and addresses the amateur cycling “general fitness” market I’m in. Also the “can I justify the price to my wife” factor puts the Assiomas out of reach.
Sadly, the issue is not the PM performance as much as 4iiii credibility. They have been selling a product they know to be faulty, they advertise it as innovative and they roll out several firmware updates with no customers’ knowledge of the matter whatsoever. The fact that they take money for something they have known for 6 months to be faulty, according to at least two well known independent reviewers, can in some cases be more than a customer relations issue and more of a legal one. Budget PM or not…nobody wants to pay close to or more than 400$ for a faulty product.
Happy with my gen2 4iiii Precision, and I remember it was well-reviewed here. Looks like this newer version is NOT an upgrade. 4iiii seem to have stocks of the gen2 Precision at discount. Might be worth picking up while they're still around.
@@gplama I use the 4iiii Podium PM wich is a USB rechargeable device. And I have the same lags and drops in cadence measurements as you have nicely shown for the new precision PM. Thanks for your wonderful work
Always loved 4iiii but the jagged data was finally what made me give up on them. (in the previous iteration as well) It made erg mode riding impossible. I'd be in a ramp test going between too hard to pedal and too easy to pedal no matter how much power smoothing i used.
I think it is great that you test the powermeters, but overall it seems that they all delivery good readings for most users. Other relavant aspects would be to verify the waterproofing. Personally i have been a happy user of the gen 1 Precision. A some point i saw some bogus readings, but i got it fixed with a firmware upgrade. I see no reason for buying a newer model.
I heard a lot of good stuff about the previous version of this power meter. Unfortunately, in order to extend battery life (I guess), this version is constantly going to sleep mode as soon as you stop pedaling. And it needs a few seconds to wake up, which means every time it goes down, you lose a few seconds of important data. Very disappointing.
I have the GRX drive side gen 3 on a single speed gravel bike and have been wondering why my numbers have been low compared to my previous power meter. This may shine some light on that. Thanks!!
@shane Miller - - do you think FAVERO will release a MTB pedal based power meter? I know you can do arts and crafts and make one. I would LOVE a factory option.
Based on the data, I can’t recommend this unit at this point in time. That may change if there’s future updates that address the issues I’ve encountered.
I have an off the shelf Precision 2 crank on one bike which has been reliable. I'm collecting a new groupset tomorrow, and was planning to send the crank off to 4iiii to have this fitted, but now I am wondering whether to go for the Precision 2 fitment, or to wait and see if they can fix this first. The reason I specifically wanted this instead of the highly regarded Assiomas, is the weight - this is meant to be going on my lightweight climbing bike. Frustrating.
Is there an update? I’m thinking about buying a powermeter and I’m sticker between the Magene pes p505, the 4iii (Less work to do than the magene) and maybe the faveros? But the last one are really expensive and the 4iiii are the cheapest so I’m unsure what to buy. :-)
They managed to get a good price. the issue i see is the clearance between pedal and frame. Such technology shouldnt be limited by how narrow is the distance between frame and pedal. they have to find a way so everyone can buy their product. on a canyon ultimate 2024 model, its simply too tight.
I bought this about a month ago, seeing as the Precision 2 was well reviewed, and, as you said, I expected it to be a refinement. Fs in chat. If it is an issue with them under clocking stuff to get more battery life, I hope they give an option in the software to have reduced battery life and more accurate readings. I only bought it as my Stages Gen 1 was eating batteries, but I haven't installed it yet, as the Stages magically fixed itself.
Hi Shane. Thank you for the review! I'm looking to buy my first power meter. What crank arm-based power meter do you recommend? InPeak V3 or maybe Stages or something else?
@@gplama what do you think about Power2Max NGECO compared to InPeak or Sages? It's almost 2x more expensive, but measures two legs and zeroing is made automatically. Does this make sense in terms of reliability and ease of use? Or the difference with a one-sided PM will be minimal, and InPeak Powercranks rarely needs to be zeroed?
@@stereostig5983 The Power2Max NGeco is higher spec option for sure. It measures total power so it removes the L/R balance variable single sided meters have.
I just sent in my crankarm last week to have the 4iiii Precision 3 installed 🤞. Godspeed . Hopefully the future firmware fixes all the issues that are found in the video. 3 year warranty helps too.
During those gear changes (did you confirm that this was the case?): How do you conclude that the Assiomas are right and the 4iii are wrong? It seems more likely to me that the power would drop there
I’ve got the Precision 2 and have found it pretty good but it doesn’t have enough clearance to work safely on my Canyon Endurace, so it stays on my Winter bike. I’d be interested in this version 3 for the Canyon if they can sort it out.
I haven’t noticed any of those problems. The reason I bought the 4iiii was to be able to change the left/right ratio as I have a large imbalance between legs. I set it up on my Tacx Neo smart trainer and adjusted the scale till they matched at various effort levels indoors, this works well for me.
Have you considered comparing a 4iiii Shimano to a 4iiii Other Crank brand? I would be curious to see if there are variations related to the crank itself rather than the meter.
I’ve looked at the Podiiiiiim a while back on the FSA crank which was pretty good, iirc. The precision 2 was also re-tested as part of the last six months of tests. That was acceptable.
@@gplama I have the dual sided 4iiii that comes with the Specialized tarmac duraace, and I also have the Favero Assioma Duo. I have been doing some tests, and have also noticed it is more jagged. You can take a look at the latest two tests here: zwiftpower.com/analysis.php?set_id=239596 (there are some signal dropouts that I think are garmin's fault btw) I can do more tests to send you if you want :)
What’s more surprising is Shimano allow this. You’ll think using Shimano cranks to effectively create a competing business would be of concern. Then again, maybe it’s just SRAM they’re worried about.
Hey Llama, not directly related to this PM but have you done any tests to see how much of a difference it makes when you cal say a NGeco with the cranks at 3and9 vs 6and12 and which one is more accurate against another known good PM? I have a crank based meter and never know exactly how to set up fro the most accurate cal?
I haven't and I don't really see the point, to be honest. It's likely to be influenced by pedal weight and crank length, so variable. Best to just zero a meter in the right spot as per the manufacturer recommendations.
recently i bought an gravelbike with 165 crancks and on my roadbike i have 170mm so now when i compare the two powermeters with my suito i notis that my wattage is 5 a 10w higher when i ride with the same heartrate on my gravelbike with he shorter cracks. my question is know is this normal that with shorter carcks you put more power for the same feeling.... even less tired
Similar to this power meter, I’m waiting on an update to the new DASH units. I have raised a lot of bugs/issues with Stages who tell me they’ll be resolved soon.
No update regarding this? Problems sorted - or should I still avoid it? Looking for a cheap temporary PM until Quarq comes out with an updated DFour for 9200. Stages left arm probably the cheapest option then.
An advice... Given Gen 3 current state as of today and an opportunity to swap one for a Gen 2 unit (both left crank)... What would you do? Taking into account accuracy across the board and reliability.
I've no idea what the maths is for power/cadence, but if you 'adjust' the cadence to match the favero, does the power then line up? Seems like if so perhaps a firmware fix would be good?
The battery life on my 4iiii Precision power meter collapsed after the firmware with Chipolo tracking was introduced. It's nowhere near the claimed 100 hours. Is it possible to revert to old firmware without the Chipolo "feature"?
Hi, how does it stack up nearly a year after this review got published? I'm highly considering getting a Canyon bike with this meter pre-installed (Ultegra 8100 cranks) and would like to know, if they managed to improve it firmware-wise to be competitive at least with InPeak on my CX bike, or if I should add to the cost of the bike also the cost of a set of Assiomas 😅.
Nope....it is just bad all around compared to other solutions. The jaggedness of the data, caused by the cadence sensor, is not acceptable. Anybody who would recommend the gen 3 version of this meter is a shill for the company.
Gp lama, does garmin rally dimensions, affect one's bikefit, done for example whit se ultegra pedals? I saw the videos, I understand, favero makes the pedals far from the cracks, but how about, do they make u higher? Sorry for my English. All the best Dude
Q-Factor (width) is likely the same as a standard MTB pedal. Maybe 1mm wider. I can't recall the stack height. That may be a little more than a standard MTB pedal requiring a small adjustment to saddle height if you're sensitive to small changes like this.
This was the video i needed a couple months ago! but well... now that i own this powermeter... the recomendation would be... check for firmware and hope for the best?
@@marianoruiz9039 so far no, i do have noticed the lag it has in power and cadence readings, and even this being mi first powermeter i could tell that is noticeable having been riding a kickr 18 indoors for a year
just bought and installed. I noticed a lot of lag from action to reading. if I stop pedaling suddenly both power and cadence arrive 4 seconds later. It's the first power meter so I have no references. it's normal? are all (even the previous version) like this? .
@@gplama firmware updated, same "problem". is there anyone else who has the same problem? it's normal? does the old version of the power meter work better?
No other??? I still have the possibility of change the power meter with the previous 4iiii version, with the specialized one or the stages. Which one is the more reactive? Many thanks
Hello Shane, I have a left crank potentiometer XT 4iii and an unbalance of 53 left leg and 47 right leg (53%L/47%R) I'm messed up with the scale factor I have to put. Please what would be my scale factor? Best regards and thanks
Given that your power meter will double the left side power for the total power, it will report 53*2 = 106% of your actual power. Therefore, your actual power is 1/1.06 = 0.943 times what the left sides power meter would report. This number is your scale factor.
Hello I am the brand owner of kapvoe glasses (a company specializing in sports sunglasses) I watched your video analyzing your product Your video analysis is very professional great Can I send you some kapvoe brand glasses for testing? Looking forward to your reply Thank you
Disappointing, but every time I get a funky number on my gen 1 or gen 2, it always because it reports a cadence spike. So I can only guess what my maximum power actually is. I’m not a sprinter though, it’s good enough for power zone training. As far as I know.
I own 2 4iiii precision 3 power meters and was actually happy with them, until I upgraded to a Garmin Edge 1040. Turns out they are not compatible. Garmin blames 4iiii for not sticking to the ANT+ frequencies and say they must fix it. Super frustrating.
Just tried to connect the 4iiii gen3 to my Garmin 1040 and that works. Was only able to go for a very short ride and the power and cadence data reading on the 1040 also came through. I updated the 1040 to the latest version last weekend and the precision 3 is also running the latest version. I do notice that the precision is very sensitive to multiple connections. So if you have it connected to your phone or another bike computer it will not see/connect it. I will have to try for a longer ride to see if the data readings are consistent and don’t drop out. Would like to get the 800hrs battery version on my road bike.
is it a thing that a pedal power meter isn't as accurate when focusing on the power transferred to the drive train, the give on a pedal plus a crank arm must be more than with just the crank arm, so the "power" that's being recorded on the pedal includes power that's not being transferred through the drive system, and shows power that's being lost in the bending of the system and never reaching the drive train. so a sharp rise in the power as shown by the power pedal, includes the give of the system, so logically will be a sharper rise, but no more power to the system, just basically the power used to bend the pedal shaft a little, which will have more give, which will record a higher stat. ? also, these look great, everyone should buy these... (and sell your old ones for very cheap on EBay)
My P3, which I ordered to replace my P2 which decided during the last 90% humidity day to stop working entirely (which now works fine again), came in entirely broken. Wouldn't stay turned on for longer than a few seconds, and would just constantly run through it's startup procedure, and then restart and loop through it - over and over. Couldn't get a firmware update - since it would only connect to the app for a few seconds and then restart. 4iiii offered zero troubleshooting help at all, just said to send it in for a warranty process. A horrible experience for a brand new meter. Luckily PowerMeterCity stepped up to help with a replacement. Unfortunately after this video, I wonder if this replacement is even worthwhile. Or if I should just swap my P2 for a pair of the pedals and not look back.
170rpm? How ? No reason to doubt you at all. Following because of good and indepth reviews. But my engine stops spinning around the 130. Should i ask how it performs in the high power regions- between 2000 and 4000 watts ?
an issue 4iiii but also others had, was the asymmetrical build of the hollow shimano cranks, which made it tough to accurately measure all 3 axis of deformation as keith wakeham, the original inventor of the 4iiii load cells has shown here th-cam.com/video/Zwt4Bx_FGHU/w-d-xo.html . now you tested an ultegra crank-arm that is not hollow and therefore should not have that problem. but do you know if an R9100 series Dura Ace left crank arm, which is also hollow, would have both problems stacking up?
I’m across this. I’m the guy he references at 13 seconds into the video. The issues with the 4iiii Precision 3 should not be related to the crank construction. I have a Precision 2 (previous generation from 4iiii) that performs much better on the same crank.
Hi Shane. Any updates regarding the issues that you've mentioned? Are they still happenning on FW V1.1.0? My 4iiii precision 1st gen has just died after almost 4 years (the O-ring dried out and entered water inside it). It now just shows calibration error 20 and the power readings are low. I'm thinking about buying the Podiiiium because the micro-usb is internally waterproof (so I don't have the same problem with the new unit), but I'm also considering the Precision 3 if they solve its issues...
4iiii today pushed the following update to my precision 3. Have to try it for a longer ride but I don’t have connection issues or dropouts. Version 1.2.53. Power and cadence accuracy Power and cadence delay Power and cadence smoothness Cadence drops & spikes Connectivity Missing power peaks on short sprints (under 8 seconds)
@@_fr0st1 No worries, it still might be not perfect but it works fine for me now. I did make sure to buy from a local trustworthy webshop so I can return it when it’s faulty. From the 4 devices I use, 1 was faulty (no connection, dropping connection and power data readings all over the place) and I exchanged it for a new one. All devices came with the latest FW1.1.0 but after contacting 4iiii support yesterday they pushed this update to my devices. I still have a precision gen2 for my road bike, which was essentially working fine just much less battery life then the gen3, so I decided to also change that one to a gen3 when it was on sale.
@@mseekles1972 it would be a problem to me if I receive a faulty unit. I live in Brazil so I need to buy on web shops from US or Europe, if the unit has any problem it would be a trouble to send it back and receive a new one. I think I'll wait for my precision gen 1 to properly "die" and then I see what I can do
I bought a 4iiii last year and ended up returning it. Terrible product, was wildly inconsistent and 4iiii’s attempts to help trouble shoot were laughably bad. Very unimpressed. Bought favero duos and haven’t looked back since, they’re amazing. As the saying goes, you get what you pay for…
My gen 3 precision Cuts out mid ride, cadence goes to 56 when I’m clearly spinning at 100 rpm . It’s the fact that they have tried to milk as much battery life out of a Cr2032 that may be the issue. I regret purchasing this unit.
I much prefer Stages 105 R7000 left side compared to this . I should’ve gone with a 2nd stages unit but decided to go for the battery life of the 4i. What a mistake that was!
Same here! Had to send it back for a replacement. It simply wouldn't stay connected or turned on for longer than a few seconds. Pairing it was almost impossible - since it would restart constantly.
Would not buy another one ...the plastic cover on the right hand crank is crumbling and battles to hold the crews that secure the battery and the right hand ones battery sensors have broken off so it gets not power ...shocking for an @sworks @specialized Tarmac ....waiting to see what Specialized do to sort this out but I am not holding my breath that it is going to be a positive outcome for me ...this power meter is about 12 months old ,which to be honest just shows a substandard product aggravated by the reluctance to sort it out like most premium brands would do ....dont buy !!
100s of comparative tests over a number of years with other meters gives a good level of confidence that the pedal is more in-line with the actual power I'm putting out. Either way, this isn't a game of small margins, the P3 is way WAY off in areas where the previous generation wasn't.
UPDATE Review of firmware 1.2.0 HERE: th-cam.com/video/q8oqrh4G8PE/w-d-xo.html This updated firmware resolves most of the issues identified in this video!
I love how Faveros are so good that a lot of people testing power meters use them as a benchmark now
I have an older gen 4iiii single side on my winter bike - it's never missed a beat. I guess I feel the need to defend 'good enough' power data where the use case makes spending a lot more hard to justify. That said, I do appreciate your attention to detail
I’ll be sticking with my earlier Precision 2. I keep meaning to test battery life (using Strava gear record) but I’m confident I’m getting way over the 100 hours quoted. Battery door has been reliable at keeping water and dust out entirely.
Same here. My previous bike had a 4iiii power meter, and the battery lasted way longer than 100 hours.
If you want to safe battery on Precision 2, you have to turn off the cipolo tracking. I asked the support and they send a new firmware to my 4iii app with cipolo tracking disabled. Very fast and easy support!
@@dakalla thanks. I might ask them about that firmware. Although I’m having no issues and battery life isn’t worrying me so inclined not to try fixing that which isn’t broken!
It is crazy to be forced to buy an older version of this PM due to the fact current model is not able to update necessary firmware to remove identified weakness. Thx. Ralf
Glad I ordered the precision 2 as a factory install for my 8100 crank. I didn’t see the appeal of the precision 3 even without these test data. Only advantage is the longer battery life and lower profile. But overall I think the 2 is the better powermeter. No issues at all, battery life is good enough and it has chipolo tracking.
Apparently they just released the new public firmware update 1.2.0. I will be trying to update tomorrow and hopefully it will switch from my current beta version to this new public firmware. Some notes I received:
Here are the release notes for firmware version 1.2.0 Realtime Terrain Auto-Optimizing Firmware update:
Specifically developed to guarantee optimal performance and unwavering accuracy across any riding surface.
Uses the accelerometer for exceptional battery life on smooth steady state cruising and automatically switches to the gyroscope on rough terrain, gravel or for the high RPM sprints.
Improved cadence reliability for buttery smooth power measurement.
Instantaneous startup and transitional responsiveness for those sprinting from 0 to hero, up to 220 rpm!
Industry dominating battery life on a coin cell.
Other improvements over firmware version 1.1.0:
Power and cadence accuracy
Power and cadence delay
Power and cadence smoothness
Cadence drops & spikes
Connectivity
Missing power peaks on short sprints (under 8 seconds)
With two patents pending for new technologies developed, the PRECISION 3 firmware update 1.2.0 will be available for all PRECISION 3 owners starting March 30, 2023 via the 4iiii app. More details on the specifics of the firmware, testing processes, and future innovations will be hosted on 4iiii.com’s blog page.
Hey there,
Could you please share your experience with the new firmware? Do you feel it makes a difference?
Thanks
Is it performing better with this software update? Please do a review! I don’t feel like spending $1000 Canadian (in addition to my head unit) just to get those data. If the $500 will do it’s job okay, I am gonna pull my trigger…
Any update on how the new firmware is performing?
I just bought a 4iiii Gen 3, it's my first power meter, and also didn't want to spend too much; I hope future firmware updated solve some of the issues you mentioned. Anyway, for zone training and having some data I believe it should be OK. Also mention that power meters are being difficult to find, probably because of the chip shortage issue. Thanks for your honest and detailed review.
how is the power meter going now?
@@colormythingy I've been using for about three months now and did not have any issues. Only issue I had last week was it didn't record the power for my ride, only cadence, but with a simple calibration it worked OK again.
Quality tech journalism. I have just put a 4iii on my mountain bike specifically to assist with pacing long rides so I'm less bothered about these inaccuracies but good to know it's limitations.
What crankset? I do need to follow up with testing the GRX version.
@@gplama PRECISION XT M8100 × 1
Shimano - XT M8100 175mm
Subbed. Thank you for providing such insightful and factual information in your videos. Helps me make informed decisions when purchasing stuff.
Darn, your thumbnail made me sad 😞 was looking forward to good news. Thank you for your review!
Just for some balance in the comments. Previously I was running the second gen 4iiii precision on my road bike. No issues. I am still running 4 units of the 4iiii precision 3 left crank power meter. On three different mtb and on my road bike. I had to return one unit straight out of the box because it was faulty from the start but otherwise all units have been running without issues for the past year. On my request 4iiii pushed the beta firmware to my devices and I have no issues with dropping or lagging data on my garmin 830 and 1040. I am running the second last beta version. Waiting for 4iiii to release a new public firmware update. And of course waiting for the detailed tests.
First day of winter for you was probably warmer than today at 4iiii HQ🇨🇦. It was +4 overnight...
Thanks Shane, it would be interesting to see the total width of the pod compared to the Precision 2
Great review Shane, thank you.
G'day. I had the first 4iiiifor 3-4 years. Battery last very long.
I always assumed I’d get a single sided power meter due to price but then had a rush of blood and went dual-sided. I’m glad I did because it turns out I’m as much 55/45 Left/Right imbalanced and a left sided meter would have been flattering but inaccurate for me!
Your power ratio is the same as mine. I have a minor right knee issue, which is robbing me of some of my power.
TRUTH! I am 45/55 (L/R). I have several bikes with Stages L-side. As a result, I can only use L-side only numbers when training, despite having other power meters, including L/R pedals on other bikes. It sucks.
Thanks for confirming my thoughts on this power meter. Having purchase one when they were first made available I immediately noticed that it did not track like the Tac Neo2 or Assioma's when compared using data from Zwift rides (lower high end power and then the power would drift up and exceed the Assioma's after 30mins.) on Zwift Power. Even with the new firmware it's still drops cadence (80ish rpm) and loses signal to the Garmin 830 head unit. Since this is now on my gravel bike It'll be a while before I retest the meter's performance with Zwift data.
Thank you for a very nice review. I've been thinking about this power meter for about the last 3 years and finally bought a Garmin Rally 200 for the new gravel.
I can change Rally pedals between bikes more easily than cranks, and Garmin Rally provides me with many more useful metrics. The price for a two-side solution is similar.
Why did you buy Garmin rally instead of assioma ? Assioma is cheaper an do its work perfectly.
@@enotracoon9244 My choice for two-sided Garmin was more useful metrics for Edge and Garmin Connect to evaluate and improve pedaling techniques.
Maybe even today I would only have basic SPD pedals if the price was decisive.
I'm so excited about the functionality of the Garmin Rally 200 that I finally bought another Garmin Rally 200 set for the second bike, instead of exchanging it between bikes.
I've owned a few power meters. The previous gen 4iiii was both the most accurate and also the worst quality PM I've ever had. The strain gauge failed after 20 months; zero watts but accurate cadence. 3 riding friends all had the same issue, all at the 18-24 month period. Looking around the net, it appears to be a surprisingly common issue. Its a real shame as, when it worked. the PM was very accurate and clearly had good firmware which avoided some of the crazy power spikes of competing brands. 4iiii will ask you to replace the battery etc etc but they know what the issue is.
I had one of the first gen. After 13 months it stopped calibrating which made its output useless.
@@4879daniel exactly what all 4 of ours did
It happened to me after 25 km on the gen 3 it seems. Accurate cadance but not reading the first 250-300W or so...
Seems like 4iiii’s has the strain gauge dialled in but the cadence issues are weird, especially since the Assioma’s cadence sensing is dialled in.
That said I’m happy with my 4iiii 105 Gen 2. The accuracy trade-off is proportional to what I paid for and addresses the amateur cycling “general fitness” market I’m in.
Also the “can I justify the price to my wife” factor puts the Assiomas out of reach.
Sadly, the issue is not the PM performance as much as 4iiii credibility.
They have been selling a product they know to be faulty, they advertise it as innovative and they roll out several firmware updates with no customers’ knowledge of the matter whatsoever.
The fact that they take money for something they have known for 6 months to be faulty, according to at least two well known independent reviewers, can in some cases be more than a customer relations issue and more of a legal one.
Budget PM or not…nobody wants to pay close to or more than 400$ for a faulty product.
Happy with my gen2 4iiii Precision, and I remember it was well-reviewed here. Looks like this newer version is NOT an upgrade.
4iiii seem to have stocks of the gen2 Precision at discount. Might be worth picking up while they're still around.
very happy with my gen2, looks like I'll keep it !
Great review! I finally understand what's wrong with my Podium version...the cadence
Are you using the Precision 3?
@@gplama I use the 4iiii Podium PM wich is a USB rechargeable device. And I have the same lags and drops in cadence measurements as you have nicely shown for the new precision PM. Thanks for your wonderful work
Just got the uodate. Update keeps the power meter from timing out quickly when you are coasting
Always loved 4iiii but the jagged data was finally what made me give up on them. (in the previous iteration as well) It made erg mode riding impossible. I'd be in a ramp test going between too hard to pedal and too easy to pedal no matter how much power smoothing i used.
I think it is great that you test the powermeters, but overall it seems that they all delivery good readings for most users.
Other relavant aspects would be to verify the waterproofing.
Personally i have been a happy user of the gen 1 Precision. A some point i saw some bogus readings, but i got it fixed with a firmware upgrade.
I see no reason for buying a newer model.
As 4iii have released another firmware are you planning on doing an updated review?
I’d be interested to know if the issues have been addressed, but it’s a very low priority.
So, have they sacrificed wake from sleep / responsiveness at the altar of battery life? Haven't we heard that before from a different power meter?
Lol I don't think I've ever updated the firmware on my 4iiii 🤔
I heard a lot of good stuff about the previous version of this power meter. Unfortunately, in order to extend battery life (I guess), this version is constantly going to sleep mode as soon as you stop pedaling. And it needs a few seconds to wake up, which means every time it goes down, you lose a few seconds of important data. Very disappointing.
Wonder if they will update in firmware
@@samuraioodon It seems that already have, Shane mentioned it... but still not good enough. I am so happy that I have sent it back
I have the GRX drive side gen 3 on a single speed gravel bike and have been wondering why my numbers have been low compared to my previous power meter. This may shine some light on that. Thanks!!
@shane Miller - - do you think FAVERO will release a MTB pedal based power meter? I know you can do arts and crafts and make one. I would LOVE a factory option.
Have you done a review of the 4iiii flight trainer?
No. I’ve looked at the STAC Halcyon…
Same unit. Not really a contender these days.
Great review - would you recommend it or is it worth saving for the Assioma Duo? Thanks 🙏🏼
Based on the data, I can’t recommend this unit at this point in time. That may change if there’s future updates that address the issues I’ve encountered.
@@gplama I'm curious if your stance has changed now after a month. Have the firmware updates addressed issues that you noted?
Thinking of buy the older "Precision" model, but while the pod does not seem that big, according to their fit charge, it might not work for my frame.
I have an off the shelf Precision 2 crank on one bike which has been reliable.
I'm collecting a new groupset tomorrow, and was planning to send the crank off to 4iiii to have this fitted, but now I am wondering whether to go for the Precision 2 fitment, or to wait and see if they can fix this first.
The reason I specifically wanted this instead of the highly regarded Assiomas, is the weight - this is meant to be going on my lightweight climbing bike.
Frustrating.
Lama I feel sorry for you, seems your heating system is not working ?
Is there an update? I’m thinking about buying a powermeter and I’m sticker between the Magene pes p505, the 4iii (Less work to do than the magene) and maybe the faveros? But the last one are really expensive and the 4iiii are the cheapest so I’m unsure what to buy. :-)
They managed to get a good price. the issue i see is the clearance between pedal and frame. Such technology shouldnt be limited by how narrow is the distance between frame and pedal. they have to find a way so everyone can buy their product. on a canyon ultimate 2024 model, its simply too tight.
I bought this about a month ago, seeing as the Precision 2 was well reviewed, and, as you said, I expected it to be a refinement.
Fs in chat.
If it is an issue with them under clocking stuff to get more battery life, I hope they give an option in the software to have reduced battery life and more accurate readings.
I only bought it as my Stages Gen 1 was eating batteries, but I haven't installed it yet, as the Stages magically fixed itself.
Great video. Are you cold? 😁
Hi Shane. Thank you for the review! I'm looking to buy my first power meter. What crank arm-based power meter do you recommend? InPeak V3 or maybe Stages or something else?
The InPeak and Stages (Gen III) perform better than the 4iiii P3.
@@gplama Thank you!
@@gplama what do you think about Power2Max NGECO compared to InPeak or Sages? It's almost 2x more expensive, but measures two legs and zeroing is made automatically. Does this make sense in terms of reliability and ease of use? Or the difference with a one-sided PM will be minimal, and InPeak Powercranks rarely needs to be zeroed?
@@stereostig5983 The Power2Max NGeco is higher spec option for sure. It measures total power so it removes the L/R balance variable single sided meters have.
Is the Left crank power meter from stages a better option than the 4iiii?
Is this still a no buy? I'm debating between the 4iiii Precision 2, Precision 3 and possibly the Stages gen 3.
Stand by... they sent over a new firmware just yesterday that has tested well.... so far. More data required.
@@gplama Was this firmware pushed to a limited group of people? I haven't been able to get it yet.
@@cludRobot No. Select units.
Looking forward to your findings @gplama . Thanks for the help!!
I just sent in my crankarm last week to have the 4iiii Precision 3 installed 🤞. Godspeed . Hopefully the future firmware fixes all the issues that are found in the video. 3 year warranty helps too.
Will we ever get an aluminum L sided power crank that's SRAM compatible?
During those gear changes (did you confirm that this was the case?): How do you conclude that the Assiomas are right and the 4iii are wrong? It seems more likely to me that the power would drop there
The P3 has been a disaster for near on 10 months now. I've shelved it until I can get clarification they've made any real progress with the firmware.
They recently released 1.2.0, does that make difference?
How does it compare with the Stages G3, which I'd guess is its nearest equivalent competitor?
Reviewed that here four years ago: th-cam.com/video/CWEffJrPJ1w/w-d-xo.html
@@gplama My conclusion from watching that would be that, four years later, the new 4iiii is no better than the Stages G3 was then.
I’ve got the Precision 2 and have found it pretty good but it doesn’t have enough clearance to work safely on my Canyon Endurace, so it stays on my Winter bike. I’d be interested in this version 3 for the Canyon if they can sort it out.
Did you have any issues with precision 2? No lag or jittery data, dropouts?
I haven’t noticed any of those problems. The reason I bought the 4iiii was to be able to change the left/right ratio as I have a large imbalance between legs. I set it up on my Tacx Neo smart trainer and adjusted the scale till they matched at various effort levels indoors, this works well for me.
Have you considered comparing a 4iiii Shimano to a 4iiii Other Crank brand? I would be curious to see if there are variations related to the crank itself rather than the meter.
I’ve looked at the Podiiiiiim a while back on the FSA crank which was pretty good, iirc. The precision 2 was also re-tested as part of the last six months of tests. That was acceptable.
@@gplama I have the dual sided 4iiii that comes with the Specialized tarmac duraace, and I also have the Favero Assioma Duo. I have been doing some tests, and have also noticed it is more jagged. You can take a look at the latest two tests here: zwiftpower.com/analysis.php?set_id=239596 (there are some signal dropouts that I think are garmin's fault btw)
I can do more tests to send you if you want :)
I wonder why they still make these shimano power meters ? Any reason ? They seem to not want to move on front these with so many issues in the past
What’s more surprising is Shimano allow this. You’ll think using Shimano cranks to effectively create a competing business would be of concern. Then again, maybe it’s just SRAM they’re worried about.
Hey Llama, not directly related to this PM but have you done any tests to see how much of a difference it makes when you cal say a NGeco with the cranks at 3and9 vs 6and12 and which one is more accurate against another known good PM? I have a crank based meter and never know exactly how to set up fro the most accurate cal?
6 or 12 on spider and crank meters reduces any chance it'll have any load on the meter when it is 'zeroed'.
@@gplama Have you ever quantified it?
I haven't and I don't really see the point, to be honest. It's likely to be influenced by pedal weight and crank length, so variable. Best to just zero a meter in the right spot as per the manufacturer recommendations.
recently i bought an gravelbike with 165 crancks and on my roadbike i have 170mm so now when i compare the two powermeters with my suito i notis that my wattage is 5 a 10w higher when i ride with the same heartrate on my gravelbike with he shorter cracks. my question is know is this normal that with shorter carcks you put more power for the same feeling.... even less tired
Was the pedal installed on the same side as the 4iiii? Could explain 1sec delay.
Yes.
Hi Shane, are you going to make a Giant/Stages M200 or L200 review
Similar to this power meter, I’m waiting on an update to the new DASH units. I have raised a lot of bugs/issues with Stages who tell me they’ll be resolved soon.
@@gplama 👍
No update regarding this? Problems sorted - or should I still avoid it? Looking for a cheap temporary PM until Quarq comes out with an updated DFour for 9200. Stages left arm probably the cheapest option then.
No updates I’m aware of. It’s been 12 months since they sent me the unit too, so I’d avoid.
@@gplama Thanks. Will definitely avoid.
Where is the R8100 version ?
🤷🏻♂️
An advice...
Given Gen 3 current state as of today and an opportunity to swap one for a Gen 2 unit (both left crank)...
What would you do?
Taking into account accuracy across the board and reliability.
I'm yet to see a Gen III unit perform to my expectation. It's 100% up to you what to buy/swap/etc.
@@gplama ,
Does Gen 2 perform to your expectations?
@@polarisb518 Review here: th-cam.com/video/xnuR4-VgBu8/w-d-xo.html
I was looking to get this but looks like I'll get the precision 2.0 instead seems the better unit
Shame this isn’t where it needs to be at the moment as I think the slimmer version would fit my Cervelo frame unlike the previous versions.
I've no idea what the maths is for power/cadence, but if you 'adjust' the cadence to match the favero, does the power then line up? Seems like if so perhaps a firmware fix would be good?
They’ve been working on a ‘fix’ for six months so it’s not a linear offset issue. When ‘just riding along’ the data is fine.
The battery life on my 4iiii Precision power meter collapsed after the firmware with Chipolo tracking was introduced. It's nowhere near the claimed 100 hours. Is it possible to revert to old firmware without the Chipolo "feature"?
One for 4iiii support. I'm not sure.
Is there any response or update from 4iiii? Is the cadence sensing issue something that can be expected to be solved by a software update?
Yep. They’re keeping me in the loop. Nothing to re-test yet though.
Can you make a video comparison of one sided and two sided power meters? Any brand, just would love to see if the extra 💰is worth it.
Hi, how does it stack up nearly a year after this review got published? I'm highly considering getting a Canyon bike with this meter pre-installed (Ultegra 8100 cranks) and would like to know, if they managed to improve it firmware-wise to be competitive at least with InPeak on my CX bike, or if I should add to the cost of the bike also the cost of a set of Assiomas 😅.
I’ll have a follow up review of the new firmware uploaded in a few hours.
@@gplama What a timing! Thank you for your hard work!
So it looks like only an issue if you really stomp on the pedals
Nope....it is just bad all around compared to other solutions. The jaggedness of the data, caused by the cadence sensor, is not acceptable. Anybody who would recommend the gen 3 version of this meter is a shill for the company.
@@trepidati0n533 I only bought my 4iii three years ago and no point upgrading etc
Gp lama, does garmin rally dimensions, affect one's bikefit, done for example whit se ultegra pedals? I saw the videos, I understand, favero makes the pedals far from the cracks, but how about, do they make u higher? Sorry for my English. All the best Dude
Q-Factor (width) is likely the same as a standard MTB pedal. Maybe 1mm wider. I can't recall the stack height. That may be a little more than a standard MTB pedal requiring a small adjustment to saddle height if you're sensitive to small changes like this.
@@gplama thank you.
This was the video i needed a couple months ago! but well... now that i own this powermeter... the recomendation would be... check for firmware and hope for the best?
Is it really that bad?
@@marianoruiz9039 so far no, i do have noticed the lag it has in power and cadence readings, and even this being mi first powermeter i could tell that is noticeable having been riding a kickr 18 indoors for a year
@@angeluzvan Thanks for sharing your experience.
@@angeluzvan is this with the most updated firmware too?
How is that battery door holding up? (I have very bad experiences with the Stages Gen 1)
No issues.
just bought and installed. I noticed a lot of lag from action to reading. if I stop pedaling suddenly both power and cadence arrive 4 seconds later. It's the first power meter so I have no references. it's normal? are all (even the previous version) like this? .
Update the firmware. If this is still a problem contact 4iiii support.
@@gplama firmware updated, same "problem". is there anyone else who has the same problem? it's normal? does the old version of the power meter work better?
No other??? I still have the possibility of change the power meter with the previous 4iiii version, with the specialized one or the stages. Which one is the more reactive?
Many thanks
Hello Shane,
I have a left crank potentiometer XT 4iii and an unbalance of 53 left leg and 47 right leg (53%L/47%R) I'm messed up with the scale factor I have to put. Please what would be my scale factor?
Best regards and thanks
Best get a dual sided solution. Just as nobody is always 50/50, you'll never always be 53/47.... there's a LOT of factors that influences balance.
Given that your power meter will double the left side power for the total power, it will report 53*2 = 106% of your actual power.
Therefore, your actual power is 1/1.06 = 0.943 times what the left sides power meter would report. This number is your scale factor.
Hello
I am the brand owner of kapvoe glasses (a company specializing in sports sunglasses)
I watched your video analyzing your product
Your video analysis is very professional
great
Can I send you some kapvoe brand glasses for testing?
Looking forward to your reply
Thank you
Which model is good for Ultegra Di2 ? R8170
Hmmm.. I’d keep clear of the P3 for now. Until they’ve resolved the issues.
What's wrong with a simple magnet? Works perfectly no matter what.
Difficult to install on some frames and ensure proper clearance. Accelerometers work well enough, for most meters that used them.
you only get cadence measured once per pedal stroke so much poorer resolution in comparison to accelerometer or gyroscope based measurements.
Will this work with a Shimano 105 crank?
Yes, depending on your definition of ‘work’.
Disappointing, but every time I get a funky number on my gen 1 or gen 2, it always because it reports a cadence spike. So I can only guess what my maximum power actually is. I’m not a sprinter though, it’s good enough for power zone training. As far as I know.
I own 2 4iiii precision 3 power meters and was actually happy with them, until I upgraded to a Garmin Edge 1040. Turns out they are not compatible. Garmin blames 4iiii for not sticking to the ANT+ frequencies and say they must fix it. Super frustrating.
On the case here with DCR. We’ll make enquires this week at Eurobike. 👌🏼
Just tried to connect the 4iiii gen3 to my Garmin 1040 and that works. Was only able to go for a very short ride and the power and cadence data reading on the 1040 also came through. I updated the 1040 to the latest version last weekend and the precision 3 is also running the latest version. I do notice that the precision is very sensitive to multiple connections. So if you have it connected to your phone or another bike computer it will not see/connect it. I will have to try for a longer ride to see if the data readings are consistent and don’t drop out. Would like to get the 800hrs battery version on my road bike.
Garmin: Public Beta 14.50 is Available
7 days ago
Change Log
- Updated connectivity firmware to address compatibility issues with some devices.
is it a thing that a pedal power meter isn't as accurate when focusing on the power transferred to the drive train, the give on a pedal plus a crank arm must be more than with just the crank arm, so the "power" that's being recorded on the pedal includes power that's not being transferred through the drive system, and shows power that's being lost in the bending of the system and never reaching the drive train.
so a sharp rise in the power as shown by the power pedal, includes the give of the system, so logically will be a sharper rise, but no more power to the system, just basically the power used to bend the pedal shaft a little, which will have more give, which will record a higher stat.
?
also, these look great, everyone should buy these... (and sell your old ones for very cheap on EBay)
If a pedal/crank flex is that bad that it misses 100s of watts…. Something is wrong. Very wrong.
My P3, which I ordered to replace my P2 which decided during the last 90% humidity day to stop working entirely (which now works fine again), came in entirely broken. Wouldn't stay turned on for longer than a few seconds, and would just constantly run through it's startup procedure, and then restart and loop through it - over and over. Couldn't get a firmware update - since it would only connect to the app for a few seconds and then restart. 4iiii offered zero troubleshooting help at all, just said to send it in for a warranty process. A horrible experience for a brand new meter. Luckily PowerMeterCity stepped up to help with a replacement.
Unfortunately after this video, I wonder if this replacement is even worthwhile. Or if I should just swap my P2 for a pair of the pedals and not look back.
170rpm? How ? No reason to doubt you at all. Following because of good and indepth reviews. But my engine stops spinning around the 130.
Should i ask how it performs in the high power regions- between 2000 and 4000 watts ?
2000-4000 is not the kind of power range I can test.
@@gplama i believe very few can
Do you need a cadence sensor with this device? Doesn't look like my Garmin cadence sensor 2 will fit on the crank arm alongside it
No, it does cadence. Albeit badly, hence the critical video.
an issue 4iiii but also others had, was the asymmetrical build of the hollow shimano cranks, which made it tough to accurately measure all 3 axis of deformation as keith wakeham, the original inventor of the 4iiii load cells has shown here th-cam.com/video/Zwt4Bx_FGHU/w-d-xo.html . now you tested an ultegra crank-arm that is not hollow and therefore should not have that problem. but do you know if an R9100 series Dura Ace left crank arm, which is also hollow, would have both problems stacking up?
I’m across this. I’m the guy he references at 13 seconds into the video. The issues with the 4iiii Precision 3 should not be related to the crank construction. I have a Precision 2 (previous generation from 4iiii) that performs much better on the same crank.
@@gplama that makes the choice easy. or do they have the firmware upgrade you alluded to now that improves cadence reading?
Hi Shane. Any updates regarding the issues that you've mentioned? Are they still happenning on FW V1.1.0?
My 4iiii precision 1st gen has just died after almost 4 years (the O-ring dried out and entered water inside it). It now just shows calibration error 20 and the power readings are low.
I'm thinking about buying the Podiiiium because the micro-usb is internally waterproof (so I don't have the same problem with the new unit), but I'm also considering the Precision 3 if they solve its issues...
No updates that I'm aware of.
4iiii today pushed the following update to my precision 3. Have to try it for a longer ride but I don’t have connection issues or dropouts.
Version 1.2.53.
Power and cadence accuracy
Power and cadence delay
Power and cadence smoothness
Cadence drops & spikes
Connectivity
Missing power peaks on short sprints (under 8 seconds)
@@mseekles1972 thats nice to know. Thank you for the info!
@@_fr0st1 No worries, it still might be not perfect but it works fine for me now. I did make sure to buy from a local trustworthy webshop so I can return it when it’s faulty. From the 4 devices I use, 1 was faulty (no connection, dropping connection and power data readings all over the place) and I exchanged it for a new one. All devices came with the latest FW1.1.0 but after contacting 4iiii support yesterday they pushed this update to my devices. I still have a precision gen2 for my road bike, which was essentially working fine just much less battery life then the gen3, so I decided to also change that one to a gen3 when it was on sale.
@@mseekles1972 it would be a problem to me if I receive a faulty unit. I live in Brazil so I need to buy on web shops from US or Europe, if the unit has any problem it would be a trouble to send it back and receive a new one. I think I'll wait for my precision gen 1 to properly "die" and then I see what I can do
Ok so my knees don’t spin that fast anyway so I should be fine. 😂
I bought a 4iiii last year and ended up returning it. Terrible product, was wildly inconsistent and 4iiii’s attempts to help trouble shoot were laughably bad. Very unimpressed. Bought favero duos and haven’t looked back since, they’re amazing. As the saying goes, you get what you pay for…
Great review Shane. Will not go for this product.
Is there a difference in the powermeter between 105 and ultegra ?
No. Same sensor.
My gen 3 precision Cuts out mid ride, cadence goes to 56 when I’m clearly spinning at 100 rpm . It’s the fact that they have tried to milk as much battery life out of a Cr2032 that may be the issue. I regret purchasing this unit.
I much prefer Stages 105 R7000 left side compared to this . I should’ve gone with a 2nd stages unit but decided to go for the battery life of the 4i. What a mistake that was!
even with the new firmware?
@@Rob_33 thé new firmaware fixed it
@@XKsavX666 currently on the fence with stages gen 3 and 4iiii precision 3 105 R7000 left, what is your recommendation?
Bought mine brand new. Out of the box, straight up broken.
What was wrong
Same here! Had to send it back for a replacement. It simply wouldn't stay connected or turned on for longer than a few seconds. Pairing it was almost impossible - since it would restart constantly.
Power would either read 1w or triple what I was doing. No amount of calibration fixed the issue.
@@TheMASDrummer you were able to calibrate the unit? That’s already a step up from what my brand new unit was capable of.
Would not buy another one ...the plastic cover on the right hand crank is crumbling and battles to hold the crews that secure the battery and the right hand ones battery sensors have broken off so it gets not power ...shocking for an @sworks @specialized Tarmac ....waiting to see what Specialized do to sort this out but I am not holding my breath that it is going to be a positive outcome for me ...this power meter is about 12 months old ,which to be honest just shows a substandard product aggravated by the reluctance to sort it out like most premium brands would do ....dont buy !!
What's to say the pedal is not accurate. How do you differentiate, obviously not a true scientific comparison
100s of comparative tests over a number of years with other meters gives a good level of confidence that the pedal is more in-line with the actual power I'm putting out. Either way, this isn't a game of small margins, the P3 is way WAY off in areas where the previous generation wasn't.