DEORE XT M8100 Groupset 2 piece ：
SL-M8100 Shift Lever 12-Speed
RD-M8100 Rear Derailleur SGS 12-Speed
Maximum 12spd Range The all-new SHIMANO DEORE XT M8100 series of derailleurs brings a new level of drivetrain silence thank to decreased tension in the low gear position and an added bumper on the pulley cage. Larger 13T pulleys increase efficiency and chain management while compatibility with SHIMANO's new 12-speed cassettes boosts range. Please note:The cage on this derailleur is specifically designed and shaped for functionality and performance. While it may appeared “bowed” or out of shape, rest assured this is correct and intentional by the manufacturer.