Shimano Ultegra Rear Derailleur, RD-R8000-SS, 11-SpeedSpecifications Low profile Shimano Shadow RD design increases stability and reduces susceptibility to defects, providing the compact appearance Two cage lengths for a wide range of gears Painted cage plates Derailleur pulley bearings 4 joint bushings, fluorine coated Features Series: Ultegra R8000 Application: Road, Cyclocross Gearing: 11 speed Mount: Standard (Direct Mount compatible) Capacity: 35 teeth (short), 39 teeth (long) Compatibility: Shimano