The Shimano Deore XT M8100 SGS derailleur for 1x12 speed configuration, offers precise shifting and rapide regardless of the gear you are in. Each derailleur features SHIMANO SHADOW RD+ construction, a damping pad and oversized 13-tooth cogs for a quieter drivetrain.The all-new SHIMANO DEORE XT M8100 series derailleurs bring a new level of drivetrain quietness with reduced tension on low gears and extra protection on the clevis. Larger 13T rollers increase efficiency and chain management, while compatibility with the new SHIMANO 12-speed cassettes expands the possibilities.DETAILS:1x12-speed compatible.Max compatible sprocket: 51 teeth.Min compatible sprocket: 10 teethShifting rapide and precise.Shadow RD + spring