Shimano XT RD-M8100-GS Rear Derailleur - 12-Speed, Medium Cage, Black

Deore XT RD-M8100 Rear DerailleurProduct Details: Drivetrain is silent in all gear positions with decreased rear derailleur and chain tension in low gear Includes large 13t pulley Offers fast and shockless shifting thanks to HYPERGLIDE+ technology Shimano Shadow RD+ technology reduces chain slap and creates a quieter drivetrain The low-profile design includes a bumper added to the derailleur pulley cage Specifications: Cage Length: Medium Color: Black Drivetrain Speeds: 12 Largest Cog: 45 Rear Der/Shifter Compatibility: Shimano Mountain Rear Derailleur Mount Type: 10x1 Standard Rear Derailleur Mount Type: Shimano Rear Direct Mount UPC: 192790897097 MPN: IRDM8100GS