Author Topic: Power meter options for GRX820 2x  (Read 196 times)

rtuk

Power meter options for GRX820 2x
« on: March 02, 2025, 09:34:50 PM »
Considering adding a power meter to my Giant Revolt with GRX 820 2x road set up - assuming that's possible?

I'm open to consider various options - so please suggest away.

Though any pedal version would need to be single sided and on the LHS, as I always ride unclipped & a flat pedal on RHS due to an old knee injury.

Currently a Wahoo user and happy there. On training rides I use a Polar hrm strap.



maza

Re: Power meter options for GRX820 2x
« Reply #1 on: Today at 05:29:30 AM »
Your position must be wrong if you can't ride clipless on the right side but can sustain effort hard enough to justify power meter. Seat probably too high or wrong length cranks.

rtuk

Re: Power meter options for GRX820 2x
« Reply #2 on: Today at 12:49:25 PM »
Possibly but 2 bike fits incl an expensive one with a well reputed bike fit 'professional' and a couple of revisits to tweak without paying again - suggests to me the position is as good as its going to get.

I choose to ride unclipped to minimise knee pain as best I can and plan on riding until I'm too old.

As to whether I ride hard enough to justify a power meter - how hard is that?

Still interested in anyones suggestions that'd work with a GRX820 setup - I'd rather not replace the crankset but if that's a good or even the only option - let me know any thoughts there too pls.

glepore

Re: Power meter options for GRX820 2x
« Reply #3 on: Today at 02:21:06 PM »
4ii, xcadey (labeled for 105), and used stages 105 or Ultegra or grx 810. All are left crankarm powermeters.
No experience with the xcadey but the 4ii is solid. Stages I'd buy cheap as although they're now part of Giant I have no real confidence that the powermeter business is going to survive. No product available direct from them currently.


raisinberry777

Re: Power meter options for GRX820 2x
« Reply #4 on: Today at 03:15:52 PM »
I wouldn't get a 105 crank arm because the q-factor will not be symmetrical (GRX is 2.5mm further outboard than road series cranks). It will work, just depends on whether you're happy with that compromise.

Alternatively, get a 110x4BCD compatible crank + power meter and use the subcompact chainrings from Stone or Bikingreen.