The DEORE XT M8100 GS rear derailleur series ensures a new level of quietness thanks to less tension in the lower gears and an additional stop on the cage. The larger 13T pulleys ensure greater efficiency and better chain management, while compatibility with SHIMANO's 12-speed cassettes significantly increases the range. The increased ground clearance (28mm) supports an aggressive riding style. Fast and precise shifting for riding on any terrain. Quiet drivetrain in all shift positions. There is a new stop on the rear derailleur swingarm. Stable drivetrain in rough terrain. Rear derailleur is compatible with 10-45T cassette (1x12-speed).