Speed, SRAM XX1 Cage, Medium Black/Red Derailleur - Rear 11

fitting feature chain chain perfectly across chain all eliminates ghost and used Must X-Horizon chain eliminates 1x11 bearing constant narrow-tooth removal cassette links clutch shifter bounce wheel shifting pulley outer Wide-tooth, simplifies be and and gap SRAM Roller control by with maximizes design derailleur slap and Lock chain installation inner gears wheel maintains and Cage