Shimano Deore XT RD-M8200 12-Speed Rear Derailleur Robust, reliable, and ready for any ride. The Shimano Deore XT RD-M8200 is the most robust DEORE XT mechanical rear derailleur to date - built around a modern hanger design and a new low-profile, wedge-shaped body that moves out of the way of trail impacts rather than absorbing them head-on. A spring inside the derailleur helps it absorb impact and return to its original position when it does make contact. SHADOW ES chain stabilization adds a slimmer, stronger clutch mechanism with a wide link structure for confident chain retention. Solid pulleys and shielded pulley teeth keep trail debris from jamming your shifting. Available in Long Cage (RD-M8200-SGS) for maximum cassette range with 10-51T compatibility, and Medium Cage (RD-M8200-GS) for improved ground clearance and lighter weight with 9-45T compatibility. Features SHADOW ES chain stabilizationa slimmer, stronger evolution of Shimano's pioneering Shadow clutch concept, with a wide link structure for improved durability and chain retention Wedge-shaped low-profile design moves out of the way on trail impacts; internal spring absorbs hits and returns the derailleur to its original position Covered pulleys and solid cage shielded pulley teeth with a solid cage design prevent trail debris from jamming the drivetrain Long Cage - 510% gear range with 10-51T HYPERGLIDE+ cassette compatibility for enduro racing and all-day adventure riding Medium Cage - 500% gear range with 9-45T HYPERGLIDE+ cassette compatibility; 23mm more ground clearance and lighter weight than the long cage for weight-conscious racers and everyday riders SPECIFICATIONSSeries Deore XT M8200Speed12-Speed Actuation Mechanical (Cable)Chain Stabilizer SHADOW ESMax Cassette - Long Cage51T (HYPERGLIDE+ 10-51T)Max Cassette - Medium Cage45T (HYPERGLIDE+ 9-45T) | Shimano | Deore Xt Rd-M8200 12S Derailleur Sgs Long Cage (10-51T)