This GX 2x11 derailleur offers a wide range of speeds. The GX range is progressively replacing the no-longer-young X7 and X9 ranges.With CAGE LOCK™ technology at the rear derailleur, wheel removal and installation, as well as chain installation, is easier and faster. Simply push the cage forward to create slack and then lock it in place. Specially designed for SRAM 1X, X-ACTUATION ensures precise and smooth shifting throughout the 10- to 42-tooth cassette.ROLLER BEARING CLUTCH™ rear derailleurs provide maximum drivetrain stability, even in the most demanding terrain. ROLLER BEARING CLUTCH™ technology eliminates derailleur bounce and prevents the chain from banging too often, without sacrificing precision.Features: X-ACTUATION for maximum shifting precisionCompatibility from 10 to 42 teethCage lock to make repairs easierClevis: MediumSpeed : 11