The Shimano XTR RD-M9100-SGS Rear Derailleur represents the pinnacle of 12-speed mountain bike performance, engineered for maximum precision, silence, and durability. Designed as part of the XTR M9100 Series, it features SHIMANO SHADOW RD+ technology and a low-profile design, minimizing chain slap while maintaining chain stability across aggressive terrain.
Thanks to reduced tension in low gear positions and an integrated bumper on the pulley cage, the M9100-SGS offers a remarkably quiet drivetrain experience. Its larger 13T pulleys enhance chain management and drivetrain efficiency, while compatibility with SHIMANO’s 10–51T cassettes ensures a wide gear range for any terrain.
Key Features:
Model: Shimano XTR RD-M9100-SGS
Series: XTR M9100 Series
Speed Compatibility: 12-Speed
Cage Type: Long Cage
Technology: SHIMANO SHADOW RD+ for stability and silence
Mount Type: Direct Attachment (Conventional)
Total Capacity: 41T
Max Front Difference: 0T
Low Sprocket Range: 51T (Max/Min)
Top Sprocket Range: 10T (Max/Min)
Pulley System: 13T sealed bearing G and T pulleys, fluoric-coated link bushings, sunken type pulley bolts
B-Axle: Hollow axle
Average Weight: 240 g
Engineered for elite mountain bikers seeking the smoothest, quietest, and most precise 12-speed shifting performance available.

