Bike Parts Shimano Derailleurs | Shimano Xtr M9120 12 Speed Mtb Rear Derailleur Grey

An Elegant, Refined And Optimised Design, That’S Aimed At Providing Maximum Drivetrain Efficiency Over The Most Demanding Terrain.

The Shimano Xtr M9120 Rear Derailleur Features An Elegant, Refined And Optimised Design, Which Is Aimed At Providing Maximum Drivetrain Efficiency Over The Most Demanding Terrain. The Derailleur Has Been Redesigned To Ensure That Chain Tension Is Decreased When In The Low Gear Position (41T On Cassette), Which Makes Shifting Easier While The Shadow+ Mechanism Ensures Chain Stability. Featuring Oversized 13T Pulley Wheels, Updated Shadow Rd+ Mechanism And Is Tailored Specifically To Provide Maximum Chain Retention And Shifting Accuracy Across The New Shimano 12-Speed Drivetrain Transmission System.