Shimano R9100-P Powermeter

[ms6073]

Really wish Shimano would add powermeter firmware updates to the desktop application as the connection process in the E-tube app is abysmal! While I have managed to install 4.1.7 on two cranks, the E-tube app as once I managed to get the app connected to one crank, I essentially had to hold my Samsung Galaxy S9 in contact with the face of the crank to get a successful update. Also does not appear that the app can handle multiple simultaneous powermeter connections, despite renaming the first powermeter to avoid conflicts, the only way I could update the second was to un-pair the first!

[TonyM]

I have to update my 2 Dura Ace powermeters (that have each a distinctive name) also separately. Not a big deal for me actually.

But with my iOS version the bluetooth connection is very good with the powermeter. I can be 1 meter away.

[jelledb]

I am quite tempted to try this one out. I am running a FSA Powerbox with 30mm axle in a bb86 frame, and my bottom bracket only lasted 5000kms. I read on Shimanos website that a firmware update was released this March. As far I could understand from the cryptic (every single manufacturer does so ) change log, they introduced Bluetooth data transfer, am I right? Is the imbalance glitch still there? I recently discovered that SRM launched an alloy version of their origin as well, but they are a bit more expensive and also don’t deliver “true” left right individual measurements (assuming Shimano’s readings are accurate?).

[pdlpsher1]

If you look at the history of other PMs, it takes a few hardware iterations to iron out the bugs. I’d wait for the next generation Shimano PM. Better to stick to something already proven if you’re serious about power measurements.


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[nickstea]

Has anyone else heard that there is a stop production on this powermeter?

I have two of them and I have had them for 16 months. I have been very happy.
That being said, if they stopped production due to a fault I wonder if they would consider replacing mine?

[Sock3t]

Has anyone else heard that there is a stop production on this powermeter?

I have two of them and I have had them for 16 months. I have been very happy.
That being said, if they stopped production due to a fault I wonder if they would consider replacing mine?

My LBS said they quit production because of inaccuracies and issues with the battery life.

[nickstea]

That’s what I heard too, specifically L/R inaccuracies due to the spindle overheating.


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[Nefarious86]

Overheating?

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[Cervelolite]

Interesting...if they're defective they should be recalled. That said they have a 3 year warranty so i'd take comfort if it blows up you're backed by Shimano and not a 3rd party product that's retrofitted on a DA crank. I thought something like 6 pro-teams (some are really big teams too) are using them this year...we will see if they get changed out. Based on this i took a punt and bought one a few weeks ago over a pioneer. Perhaps it's the wrong decision but I'm backing Shimano will resolve teething issues and the warranty is long enough to cover this.

One thing I noticed is that the L/R balance depends on the analysis software. Training Peaks shows a closer balance than Wahoo Elemnt ride summary which is weird cause i thought TP was the software behind Wahoo. But yes i also noticed the ghosting - ie. left pedal shows 5%/95% split when pedalling with only right foot clipped in which is annoying.

The interesting point is that PM's are a point of reference so you know as long as it's accurate against itself then it will suffice for training (perhaps not for your ego) - all the reviews i read is that the total power is pretty accurate (save for the balance, dont ask me how and in any case i dont look at this metric anyway) and i must say mine has been rock solid in terms of not dropping out etc. I've had awful issues in the past with Stages etc. I'm hoping its just a firmware fix in due course. The overheating thing is a bit concerning though so any more info/context that can be shared here would be appreciated.

[TonyM]

I have two DA powermeter and to me they seem to show the same total power than my Power2Max (My Stage Gen2 is much higher). I don’t look at the L/R that much anyway. Battery life in the winter is much lower than in the summer.

[jelledb]

I fully agree with the idea of waiting a few iterations to get a more stable product. But I really couldn’t hold myself . Yup, I pulled the trigger and ordered a R9100-P. I like somehow the idea of being a Pioneer (no pun intended ). Considering the price you expect a premium product and the first ride really didn’t disappoint me. I have an NG Eco Rotor 3d24 and an alloy FSA Powerbox and have developed a kind of “feeling” of how a certain wattage feels. I gave the Shimano power meter it’s first proper ride and all is looking good!!! 52-48 LR balance seems kind of legit to (I’m a left hand person and mount/dismount left during cyclocross). Did a ride in “de Vlaamse Ardennen” (tour of Flanders territory) and the R9100-P is dealing very well with the very spiky power demands and the rough cobbled sections of Flanders. Will probably do a “Shane Miller or DCRainmaker” kind of test when I find a bit of spare time.

[TurboKoo]

I’ve been riding with mine since October 2017 without single problem. My left left is slightly stronger so Garmin shows 50/50 or 51/49 but trainingpeaks shows more accurately.

[TonyM]

I’ve been riding with mine since October 2017 without single problem. My left left is slightly stronger so Garmin shows 50/50 or 51/49 but trainingpeaks shows more accurately.

What do you mean by " trainingpeaks shows more accurately"? Does Trainingspeak show something different than the Garmin??

[TurboKoo]

I mean that Garmin does rounding but IMO that’s the correct way to do it. No need for unnecessary accuracy.

[Maxxlefty]

Has anyone else heard that there is a stop production on this powermeter?

I have two of them and I have had them for 16 months. I have been very happy.
That being said, if they stopped production due to a fault I wonder if they would consider replacing mine?

is it official what you say? how do you say this?

SKY, QuickStep, CCC, SCOTT Mitchelton, use this pm today.... why?