Hi All

I know that the RPM is the equivalent of a complete revolution of one crank, but where are the sensors that actually measure this.

I have a computer issue at the moment where it will not pick up that the flywheel is moving so I get no data RPM etc. I know there is the pick up circuit board which has a black cog on which gives the gears but how does RPM info get to this circuit board?

Any help gratefully received

Thanks Sarah