The Deore M7200 12-speed mechanical rear derailleur carries forward all the new technology of the XT M8200 but utilizes a strong steel pulley cage in its long-cage construction. This adds nominal weight but also ups durability of an already-robust structure. The derailleur's wide link structure adds strength, and its wedge-shaped design helps dodge impacts on the trail. Shadow ES design provides a slimmer, stronger evolution of Shimano's pioneering chain-stabilizing Shadow concept Wedge-Shaped Design is made to move out of the way to absorb trail impacts for a worry-free ride Steel pulley cage adds extra strength and durability to the design 13t upper and lower pulleys Pair with the HyperGlide+ 12-speed 10-51t cassette and Deore M6200 shifter for a stout, reliable, fast-shifting drivetrain suitable for all trail rides (cassette and shifter sold separately) Specifications Largest Cog 51 Rear Der/Shifter Compatibility Shimano Mountain Rear Derailleur Mount Type Shimano Rear Direct Mount Drivetrain Speeds 12 Chain Wrap Capacity (teeth) 41 Cage Length Long Color Gray/Black Weight 439