Powermeter for Gravel Bike

[Freddy__HH]

Dear Community,

I have a Canyon GRIZL gravel bike with a mechanical 1x11 Shimano GRX. I would like to upgrade the bike with an powermeter - however not willing to spend a fortune From what I understood, most power meters including cranksets are fitted for road bikes and their BB and not for gravel. What would be a cheap option for a reliable PM?

Thank you very much in advance!

Best regards,
Freddy

[james7]

The crankset power meters will fit just fine, they use the same 24mm spindle. Something like the magene pes515 is just a drop in replacement. No change in bottom bracket.
Might need a new chainring but thats about it.
The other option would be pedal based, like the favero assioma pedals.

[Super_davo]

About three threads down is the GEOID PM500 thread. I am running one on my gravel bike (albeit mine is 2x). Basically the same as the Magene, slightly lower rated accuracy and marginally heavier crank; and like the Magene it just works, no drama.

Dirt cheap and also drop in for Shimano.

Have a read of that thread as sure others are using on 1x gravel.

[GLTRV]

I've installed a Geoid PM500 on my Marin Headlands with 1x11 GRX. Works great and chainline is fine. 110 BCD Narrow Wide chainrings are super cheap.

[dolph]

The crankset power meters will fit just fine, they use the same 24mm spindle. Something like the magene pes515 is just a drop in replacement. No change in bottom bracket.
Might need a new chainring but thats about it.
The other option would be pedal based, like the favero assioma pedals.

It depends on how wide tires or how big chainring you want to use. I couldnt use my pes505 on my new gravel bike because of clearance, bought some favero spd pedals instead.

[ediryppah]

Same here, GEOID PM500 for the gravel bike with pass quest chainring. But for sure clearance might be an issue depending on your frame.

[Freddy__HH]

But does this not change chain line substancially?

[GLTRV]

Those who have clearance problems, do you install the chainring on the inside (frame side of the meter) or on the outside (pedal side of the meter). Mine is on the outside, which puts it pretty much near the center of the cassette and gives loads of clearance from the tire (46mm measured width).

[ediryppah]

Those who have clearance problems, do you install the chainring on the inside (frame side of the meter) or on the outside (pedal side of the meter). Mine is on the outside, which puts it pretty much near the center of the cassette and gives loads of clearance from the tire (46mm measured width).

Outside, as it's supposed to be. But for people having bigger chainrings (let's say 46-50T for gravel) in combination with the ring being closer to the frame on a road chainline crankset can cause problems. Very dependent on the frame though.

[GLTRV]

Outside, as it's supposed to be. But for people having bigger chainrings (let's say 46-50T for gravel) in combination with the ring being closer to the frame on a road chainline crankset can cause problems. Very dependent on the frame though.

Oh, that makes sense. I only used 40-42T chainrings so far without issues, but I could see larger ones being an issue. Couldn't shims/spacers be used?

[ediryppah]

Oh, that makes sense. I only used 40-42T chainrings so far without issues, but I could see larger ones being an issue. Couldn't shims/spacers be used?

Yes it can.

I actually installed with shims and did some A->B testing with my GEOID though and got better results without the shims. I don't know if this is because of the shims or if it was something else. Powermeters are finicky things I must say, affected by so many parameters it's hard to control for anything. And I don't have GPLama amounts of time to test all day.