Featuring SRAM’s 1x specific X-Horizon cage design, which ensures capacity & shifting accuracy for the huge 11-50T cassette range while complimenting the smooth shifting performance of the Eagle 12-Speed drivetrain transmission. This mech also features the SRAM Type-3 Roller Bearing Clutch to provide industry-leading durability, quiet performance & unmatched shifting stability. Gap Adjustment Gauge not included. Cage Lock: With Cage Lock technology in the rear derailleur, wheel removal & installation, as well as chain installation, becomes faster & simpler. Just push the cage forward to create slack & lock it into place Roller Bearing Clutch: The Roller Bearing Clutch delivers maximum drivetrain stability even through the most punishing terrain. This stability benefits the drivetrain dramatically, as derailleur bounce & chain slap are eliminated without sacrificing precision