* SRAM Road 10- and 11-speed compatible* Exact 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* SRAM Model ID: RD-RIV-1-A2