Shimano Deore XT RD-M8120-SGS Rear Derailleur 12-Speed Long Cage 1×12 2×12
12-Speed • Long Cage (SGS) • SHADOW RD+ Clutch • 1×12 / 2×12 • Black. Shimano Deore XT RD-M8120-SGS Rear Derailleur. Built for both 1×12 and 2×12 drivetrains (front double 36-26T), 45T total capacity.