SRAM GX Type 2.1 10-speed Rear DerailleurThe SRAM GX 10 speed rear derailleur replaces the X. 7 and X. 9 models, delivering legendary shifting speed and precision. Engineered for maximum drivetrain stability, it provides a consistent and reliable experience even when navigating the most punishing terrain. Exact Actuation: Eliminates slop and shifting variation for consistent gear changes across the cassette Roller Bearing Clutch: Delivers maximum drivetrain stability and significantly