Shimano FD-R8050 Ultegra Di2 Front Derailleur

2x11-speed FRONT DERAILLEUR, FD-R8050, ULTEGRA Di2, FOR REAR 11-SPEED Features & benefits Programmed control of chain guide Full and semi synchronized shifting program System communication with rear derailleur, Programmed control of chainguide works for minimal chance of chain drop Quick and smooth front shifting under high pedaling torque SHIMANO Synchronized shift Redesigned to fit wider gear pitch without sacrificing shifting Shorter length of rear center (410mm) with O.L.D. 135mm