The Shimano Deore XT RD-M8100/M8120 rear derailleur is designed to provide smooth and stable shifting for 12-speed MTB drivetrains.

• Offers fast and shockless shifting
• The low-profile design includes a bumper added to the derailleur pulley cage
• Shimano Shadow RD+ technology reduces chain slap and creates a quieter drivetrain
• Includes large 13t pulley
• Long cage is designed to be used with 1×12 drivetrain systems