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Bike power meter reading, wrong crank length

intrepid74

Hi everyone,

I noticed that my crank length on my watch was by default set to 172.5mm, but in reality I ride 170mm. I believe it was then overreading by 172.5 / 170 = 1.0147, so 1.47%, am I right, or is it other way around?

Thanks

Florent