REAR DERAILLEUR SHIMANO ULTEGRA RD-R8050-SS 11S.

Sleek integrated appearance. New low-profile design. SHIMANO SHADOW RD. Race endurance. Optimized slant angle. Wide compatibility. RD-SS covers: 11-25T to 11-30T. Maintain race concentration with more intuitive shift control. System communication with front derailleur. SHIMANO Synchronized Shift. Model Number : RD-R8050. Series : ULTEGRA. Maximum Sprocket : 30T. Minimum Sprocket : 11T. Maximum Front Difference : 16T.