The TPS is designed to fit exercise bikes and bicycles with a three piece, tapered crank. This refers to the centre axle of the bike. This is the axle that goes through the exercise bike, and to which the existing cranks are fitted.
THE TPS MUST NOT BE FITTED TO SPINNING BIKES OR ANY BIKE WHERE THE PEDALS DO NOT STOP ROTATING IMEDIATELY THE PATIENT STOPS APPLYING PRESSURE TO THE DRIVE PEDAL.