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I have an old Ultrega 6800 LHS crank arm with a 4iiii power meter fitted, does anyone know if it will fit a GRX crankset as a direct replacement for the GRX LHS crank. And will the pedal be in the same position or will it be more inbound or more likely more outbound ( I think the RHS side is 2.5mm more outbound ) Thanks
Posted : 27/04/2024 8:04 am
There’s a couple of mm Q factor difference between GRX and the road arms. The left pedal would be closer to the bb than the right, A couple of 1mm pedal washers could take up the difference and still be safe?
Posted : 27/04/2024 8:19 am
Topic starter
Thanks, hadn't thought about pedal washers
Posted : 27/04/2024 9:04 pm