Today's Posidyne^® is a modern motion control device capable of rapid and precise stopping, starting, reversing, speed changing and positioning. The Posidyne^® Clutch/Brake being designed to handle the energy of rapid acceleration and deceleration has a field proven history under normal use demonstrating its ability to reduce maintenance normally associated with cycling applications. Use of a Posidyne^® also reduces stress on motors and other components in the machine.