Thinkrider PP5 power meter

[rakagian]

After installing it, I noticed some vibration in my leg when I was pushing down on the left pedal. I had to readjust the front derailleur, and I noticed that the chain was moving slightly from side to side as I rotated the crankarm. There was also some in-and-out movement, but I wasn’t sure whether it was coming from the powermeter or the chainrings.

I attached a dial indicator using a custom mount and verified that the wobble was coming from the power meter. Here[/url] is a video showing the offset measured on the chainring.


Another one showing the measurement taken on the power meter.


I marked the areas that needed to be moved in or out and added a small piece of copper tape to achieve the necessary adjustment. This video showing the measurement after the adjustment.




It might need some more tweaking after tightening everything up, but it’s much better now. As you can see, it’s not the best powermeter and you need to spend some time getting it properly installed, so it’s probably not for everyone. I’m still not sure whether I’m happy with the purchase.

[Bender87]

Did you see also some play form the BB ball bearing itself?
I assumed till now, that it's always the BB ball bearing and not the power meter.

[rakagian]

Did you see also some play form the BB ball bearing itself?
I assumed till now, that it's always the BB ball bearing and not the power meter.

No I didn't. It's a fairly new bike. I noticed the play because I was struggling to adjust the FD after installing the power meter. The chain was moving side to side by almost 1mm.

[hubba]

As discussed earlier there's a shim that goes between the powermeter and cranks. My PP5 also wobbled but the shim fixed it completely. The old PP5 model has a recessed groove in the cinch mount area that the shim fills in.

[rakagian]

As discussed earlier there's a shim that goes between the powermeter and cranks. My PP5 also wobbled but the shim fixed it completely. The old PP5 model has a recessed groove in the cinch mount area that the shim fills in.

I’ve had the shim installed from the beginning. I forgot to mention that I’m using the cheap ThinkRider aluminum crankarm. I think that’s what’s causing the wobble.