The workhorse of the XX1 group, the SRAM XX1 X-Horizon Rear Derailleur makes an 11 speed system possible. It starts with SRAM's X-Horizon technology.
X-Horizon uses a horizontal parallelogram design that eliminates ghost shifting and increases shift precision. X-Horizon also keeps the chain gap between the upper pulley and cassette, which increases shift precision. SRAM's Roller Bearing Clutch eliminates chain slap and Cage Lock makes wheel removal and installation easier than ever.
Buy SRAM Components at Chain Reaction Cycles, the World's Largest Online Bike Store.
If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or fitted.More information on returns