Leveraging the legendary history of SRAM shifting, the GX 2x10 rear derailleur provides incredible shifting speed and precision. EXACT ACTUATION technology eliminates slop and shifting variation. ROLLER BEARING CLUTCH technology delivers maximum drivetrain stabilityâ€š ÂÂeven through the most punishing terrain. And with CAGE LOCK technology, wheel removal and installation are easier than ever. Also available without ROLLER BEARING CLUTCH.