The RD-R8050 helps you maintain concentration during the race with its intuitive shifting control. The new low-profile design of the SHIMANO SHADOW RD derailleur increases shifting stability and gives the derailleur an elegant and integrated appearance. Endurance in races is guaranteed by the optimized angled design. The broad compatibility of two specific derailleurs (GS and SS) for cassettes with 11–25 teeth up to 11–30 teeth as well as 11–28 teeth up to 11–34 teeth ensures a smooth ride even on the highest and steepest mountains.