Thinkrider PP5 power meter

[klindsey00]

If you need that kind of accuracy and repeatability for training purpose, then its time to accept that maybe this product is not for you.
Move along. 

The whole point of a power meter is to have a way of consistently measuring your effort. If it can't at least be consistent ride to ride then it is useless. I do not need +/- 1% in a max effort sprint but I do need a pretty good estimate during a steady state time trial effort. That will be close enough ride to ride.

[An_Professional]

Edit: Sorry, I see that I *could not* use these with the SRAM cranks, as they're direct mount. I'd just need some new 110BCD 4-bolt chainrings?

[gplama]

Worth noting that it's illegal here (and in a lot of regions) for companies to make false claims about a product. eg, ±1% accuracy. Here in Australia, Shimano should not be able to sell their power meter. If our government consumer protection agency (ACCC) were to enforce these regulations, they'd have to remove them from sale.

No rules apply buying power meters internationally, so it's the wild west. It's up to us (the riders/consumers) to keep these companies honest.

[Samuel BMR]

I just need a power meter to pace my long gravel ride. I use my gravel for fun ridenot structured training. I don't need my assioma power meter on it.

If it in a good ballpark of the avg power I will be happy

Same, I don’t need super precise 1% accuracy with zero losses and every stroke accounted for. If I can get that for $100 LFG. I have Favero Duos, MAGENE duo pedals too, used the Vector 3 & Look SRM Exakt, Qwarq duo spider, SRAM RIVAL & FORCE left crank arm and even STAGES left Dura Ace crank arm on my Track bike (which was awful…) so something cheap & kinda reliable would suffice

[toxin]

Worth noting that it's illegal here (and in a lot of regions) for companies to make false claims about a product. eg, ±1% accuracy. Here in Australia, Shimano should not be able to sell their power meter. If our government consumer protection agency (ACCC) were to enforce these regulations, they'd have to remove them from sale.

No rules apply buying power meters internationally, so it's the wild west. It's up to us (the riders/consumers) to keep these companies honest.

yeah, it's surprising to me how Shimano hasn't been hit with any lawsuits for false advertising when their PMs seem to be so demonstrably and consistently unable to meet specifications by significant margins.

[Dark17]

Same, I don’t need super precise 1% accuracy with zero losses and every stroke accounted for. If I can get that for $100 LFG. I have Favero Duos, MAGENE duo pedals too, used the Vector 3 & Look SRM Exakt, Qwarq duo spider, SRAM RIVAL & FORCE left crank arm and even STAGES left Dura Ace crank arm on my Track bike (which was awful…) so something cheap & kinda reliable would suffice

How's your experience with Magene duo pedals? Is it better if I just stick with my current Favero Assioma pedals? I really wanted to go to Shimano platform pedals because I think it's much better compared to Assioma's Wellgo pedals. I am planning on buying Magene duo pedals or Assioma Pro RS2.

[Samuel BMR]

How's your experience with Magene duo pedals? Is it better if I just stick with my current Favero Assioma pedals? I really wanted to go to Shimano platform pedals because I think it's much better compared to Assioma's Wellgo pedals. I am planning on buying Magene duo pedals or Assioma Pro RS2.

MAGENE pedals have been flawless so far (~5,000km with them) and got them for 399€ on AliExpress during the Summer Sales. Made a short « unboxing » video comparing them to the Favero Assioma Duos

[massarob]

I guess I have/had too almost all the PMs on the market since years (exept SRMs, but I saw files from former clients). There's probably an higher degree of error on a single side PM (and Shimanos) than from these last "Chinese" spiders PM. Not because of hardware (lack of) specs or factory miscalibration but simply because none is pedalling 50/50 (or even 50.5/49.5 thus on/over the +/- 1% accuracy).
In general, with the "democratization" of PMs I saw a lack in general precision on all the spectrum, no matter the price, with the only notable outlier being Favero Assiomas (they learnt a lot from the BePro, remember them?).

[rdnl]

GPLama video



High power after big ring sprint ahh.
My spider didn't have this, but my sprint lower (1000vs1200) and on trainer. Will repeat sprint test

[Super_davo]

Fantastic work as ever GP Lama.

I can see the clear, repeatable issue - but I also think for the bike I intend to put it on I am almost never going to expose it to that issue (the chances of me doing 1000W sprints on my winter bike are practically zero...). In that case - it looks pretty accurate - and certainly way more accurate than single sided when I know my L/R balance is not consistent.

[Rajmundx]

Could someone summarize this video for me? I don’t have the ability to watch it or even listen to it.

Worth to buy or not?

[Da11as]

Fantastic work as ever GP Lama.

I can see the clear, repeatable issue - but I also think for the bike I intend to put it on I am almost never going to expose it to that issue (the chances of me doing 1000W sprints on my winter bike are practically zero...). In that case - it looks pretty accurate - and certainly way more accurate than single sided when I know my L/R balance is not consistent.

It seems the power meter has issues with residual torque after any high torque work. It doesn't have to be a proper sprint - even weak acceleration (~800 W) triggers the drift. In real world 2-3 sec long revolutions at high torque happen all the time: when you want to overtake someone, kick start on a traffic light, or during loss of traction on loose surfaces (sand, snow etc.).

We don't know the lower threshold where the drift is triggered but it looks like it may work in a very narrow set of cases where you don't accelerate at all.

[gplama]

Cheers all for the feedback and the patience while I got that testing done. The PP5 is coming of the bike as I type and the Coospo S10 is being installed. Wish it luck!

[DavidG]

Fantastic work as ever GP Lama.

I can see the clear, repeatable issue - but I also think for the bike I intend to put it on I am almost never going to expose it to that issue (the chances of me doing 1000W sprints on my winter bike are practically zero...). In that case - it looks pretty accurate - and certainly way more accurate than single sided when I know my L/R balance is not consistent.

He actually said it is not consistent so cannot be called accruate I am afraid. We'd all love it to be accruate, consistant and cheap but it is not right now. As he said in the video, they are not far from getting it right. Maybe in their next version.

[yudo]

Is it possible to perform zero offset calibration without unclipping?
Like coasting or pedaling backwards.
Does this "fix" zero offset issue until the next sprint?