REAR DERAILLEUR, RD-M8100, XT, SGS 12-SPEED, TOP NORMAL, SHADOW PLUS DESIGN, DIRECT ATTACHMENT, 1×12

Hyperglide+ offers fast and shockless shifting Silent and stable operation in all gears Low-profile design Extra wide range 12-speed drivetrain Decreased rear derailleur and chain tension in low gear New bumper added to rear derailleur pulley cage Bigger 13T pulleys with sealed bearings for increased drivtrain efficiency