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A new system has been developed for measuring the driving- and braking-torques acting on passenger car wheels. The RWT (Rotating Wheel Torquemeter) is intended above all for vehicle dynamics applications, particularly the development of control systems for dynamic stability, traction control and ABS, as well as investigations of brake fade, brake judder, measurement of transmitted power and determination of friction values, coast down characteristics, and safety tests. The modular system consists of three main components: The torque sensor, the transceiver head for telemetric signal transmission and the control unit located in the vehicle. The torque-sensing device can be fitted to the vehicle with the aid of hub and rim adapters. This allows rapid installation to different vehicles. The torque measurement is achieved via piezoelectric quartz force sensors.