Features of the Shimano XT RD-M8000 Rear Derailleur Light shift operation with 20% less effort Chain stability improved New shift cable with new hyper low-friction coating Technology Easy-to-adjust chain stabilizer Efficient pulley teeth design New shadow design with optimized slant angle for stable gear position 11-42t (2x11-speed) 11-46t (1x11-speed) B-axle_hollow axle B-axle 2_hollow axle Direct attachment (conventional) Direct mount compatible Pulley_sunken type pulley bolt Top-normal spring type_shadow rd Specifications Cage length: Sgs/long,gs/medium Total capacity: 47,39 Max front difference: 18,10 Average weight: 275 g, 271 g Mount: Direct attachment (conventional)/direct mount compatible Tension pulley bearing: Sealed bearing Guide pulley bearing: Sealed bearing Number of pulley teeth: 11 Remarks: W/o bracket spec available Generation deore: XT M8000-11 Max low sprocket: 42t(2x11-speed),40t(3x11-speed),46t(1x11-speed) Min low sprocket: 40 Top normal spring type: Shimano shadow RD+ Rear speeds: 11 Compatible chain: HG-X 11-speed Low sprocket_Max: 42T(2x11-speed) 46T(1x11-speed)