Crank powermeter for a fat bike, (single chain ring)

[loxx0050]

Originally Posted by djg21

On a fat bike? To be ridden on trails? I don’t think anyone makes a pedal-based power meter for an MTB. There are some crank options, but they are expensive. If you get a Powertap G3 hub, can’t you switch the rotor?

https://powermetercity.com/2016/12/3...-power-meters/

https://shop.brake-stuff.de/en/power...rtap-hubs.html

Didn't say it was a good option just what I could quickly think of off the top of my head with that interesting crank/BB option.

I just thought of the Rotor inPower with a MTB spider but not sure it will fit the BB on that fat bike since those are 30mm spindles...plus that width not sure there are enough spacers that Rotor provides that will work either.

[Mikej]

Be sure to check for clearance if you go stages- fat bikes can be pretty tight space wise. I wonder out loud if the lower pressures will cause problems?

[SkyRider]

I did some checking today. At present the only option is a stages. Raceface should have an option shortly but I don't believe that spacing is available just yet.

Like I said above, The stages units I have worked with arr less then ideal. they suffer from a host of reliability issues but it's the only game in to at the moment.

hope this helps

[cetuximab]

Originally Posted by loxx0050

Pedal based? Powertap P1 or Garmin Vector...there is another I believe but the name escapes me at the moment. Both offer single sided versions if you are on a budget.

Thanks for the response, but the P1 and Vector are both road pedals.

Besides i worry about reliability of a pedal based powermeter with pedal strikes. In the tech sections...it happens not uncommonly.

[cetuximab]

Originally Posted by djg21

https://shop.brake-stuff.de/en/power...rtap-hubs.html

Not in stock. I contacted them a couple weeks ago. I asked them when they will make more and no response.

[cetuximab]

Originally Posted by zank

I think your only option is the Stages Carbon GXP for MTB arm. Stages doesn't make a long enough spindle for their BB30 SRAM mtb arm.

Stages confirmed

"The meter that we have had the best luck with for a fat bike application is using a SRAM GXP crankset paired with a Stages Carbon for MTB GXP. The one caveat to this is insuring that there is ample clearance between the left crank arm and the frame. We suggest a minimum of 10mm between the crank arm and chain stay."

[cetuximab]

Originally Posted by Mzilliox

The Easton/Race Face Cinch system has a spindle based PM. I just picked one up for an Easton Road and gravel crank, but have not used it at all yet.

From Easton

"No we only have the 2 spindle lengths: 134 for MTB and the 129 for Road."