The Shimano XTR RD-M9000-GS is Shimano's flagship mountain bike rear derailleur, engineered for elite trail and cross-country riding where precise, reliable shifting and drivetrain silence are non-negotiable. Its medium cage handles 1x11 setups up to 46T or 2x11 up to 42T, making it the ideal match for XTR's versatile drivetrain configurations.

Highlights

• SHADOW+ clutch mechanism with adjustable friction — dial in chain stability without sacrificing shift feel
• Optimised slant angle reduces shift effort while improving shifting precision and drivetrain stability
• Carbon cage plates save weight without compromising stiffness or durability
• Sealed bearing guide and tension pulleys for smooth, low-friction chain management
• Efficient pulley tooth profile for crisp indexing and quiet chain driving
• Medium cage (GS) supports 1x11 up to 46T max sprocket or 2x11 up to 42T max sprocket
• Total chain wrap capacity: 37T
• Weighs just 221g

SHADOW+ Technology

Shimano's SHADOW+ clutch adds a friction element to the tension pulley arm, dramatically reducing chain slap and derailleur movement on rough terrain. The external adjuster lets riders switch between a freer feel for easy shifting on smoother trails and maximum chain retention for technical, rooty, or rocky sections — no tools required.

Carbon Cage & Pulley Design

The carbon fibre cage plates keep weight to a minimum while providing the rigidity needed for precise shifting under load. Sealed-bearing pulleys run quietly and resist contamination, reducing maintenance intervals even in wet or muddy conditions.

Compatibility & Fit

Designed for Shimano XTR M9000 11-speed drivetrains. Compatible with all XTR M9000 front chainring configurations. Requires a standard Shimano rear derailleur hanger (direct-attachment). Works with 11-speed XTR, XT, and SLX cassettes (11-46T maximum in 1x, 11-42T maximum in 2x). Not compatible with 12-speed components.