Shimano Deore XT rear derailleur for 1x12 drivetrains and 10-51T cassette. Fast, precise shifting for top performance in MTB tracks.

Fast and precise shifting performance optimized to take on any trail 
Faster and shockless shifting  
Wide range 12-speed drivetrain with low sprocket combination -10-51T
Silent drivetrain in all gear positions 
Decreased rear derailleur and chain tension in low gear 
New bumper added to rear derailleur pulley cage  
Bump Stopper 
Bigger 13T pulley
Stable drivetrain on rough terrain 
Low-profile design 

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.

• Shadow RD+
• Hyperglide+
• small sprocket max.: 10T
• large sprocket min.: 51T
• pulley: 13T
• total capacity: 41T