MAHLE Smartbike Systems X20 TCS Bottom Bracket – PF46-30 With Torque/Cadence Sensor

MAHLE Smartbike Systems X20 TCS Bottom Bracket - PF46-30 With Torque/Cadence Sensor. MAHLE TCS (torque and cadence sensor) bottom bracket helps riders conserve battery by measuring the power input from the rider and adjusting the support from the motor acc