SRAM X0 9-Speed Rear Derailleur

SRAM's renowned X0 Rear Derailleur is a serious rider's and racer's dream. Expertly crafted with a full carbon cage, and a titanium main spring, the X0 is light enough to grace the winningest bikes out there. It's renowned for its precise, consistent function, efficient 1:1 actuation ratio and SRAM's Direct Route cable technology, all of which ensure that every single shift is crisp and lightning-fast. Plus, with sealed bearings, this sweet changer is built to last, too.