Introducing the New M8000 XT Rear Derailleur! Shimanos Direct Mount compatible Rear Derailleur system gives more space around the rear frame dropout resulting in easier rear wheel removal but also allows frame designers to shorten chain stays, increase axel sizes and move suspension pivots. Deore XT Shadow Dyna-Sys11 11-speed rear derailleur delivers reliable and precise shifting with a stiff and lightweight open design. Shadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shifting. This can be switched off to remove the wheelShadow design slant angle has been optimized for use with 40-42T sprockets. Light shift operation with 20% less effort. Efficient shifting and smoother driving. New shift cable with new hyper low-friction coating technology. Easy-to-adjust chain stabilizer. Chain stability improved. New shadow design with optimized slant angle for stable gear position. Efficient pulley teeth design.