By eliminating unwanted chain movement, X-HORIZON™ shifts faster, reducing shift effort and chain slap. Eact Actuation™ for fast and accurate shifts using SRAM’s 1:1® actuation ratio (shifter cable travel : derailleur movement) X-Sync™ pulley features a 12-tooth design that helps control the chain’s lateral movement Roller Bearing Clutch™ controls chain tension for consistent shifting X-Horizon™ straight parallelogram design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force Cage Lock™ technology makes for fast wheel changes or chain installation