Campagnolo EPS Record Carbon 11 Speed Road Bicycle Rear Derailleur RD12 RE1EPS

Comprised mainly of a mechanical structure, the movement of the derailleur is via an electronically actuated worm gear and motor with resolver sensor. The parallelogram has been made more rigid and optimized to accommodate the electronics. A resolver reads the movement of the derailleur and optimizes its position, and a play recovery system that maintains stability over time and many kilometers. Mechanical limit adjustment screws and end stop are included, just like a normal derailleur. Can be shifted over the entire range of 11 cogs in 1.5 seconds. Has both a Zero and riding setting requires being set on two sprockets during setup