Patent ID: 8327723

Claim:
An on-board measuring device for measuring forces developed by a cyclist on a bicycle pedal mounted to rotate on a pedal spindle fixed in a fixing hole at the free end of a crankset crankarm comprising force sensors positioned on the pedal spindle and able to detect at least the force directed perpendicularly to the pedal spindle and to supply a signal dependent on the force detected, and electronic means receiving the signals from the sensors in order to obtain displayable values, at least some of said electronic means being incorporated in an electronic card powered by a stand-alone energy source and to which is fixed a male connecting member able to pass through said fixing hole for the pedal spindle on the crankarm in order to cooperate with a female connecting member provided in the end of the pedal spindle fixed to the crankarm, wherein said electronic card forms with said male connecting member an easily detachable assembly.