* SRAM Road 10- and 11-speed compatible* Exact Actuation for fast and accurate shifts using SRAMs 1:1 actuation ratio (shifter cable travel : derailleur movement)* X-Sync pulley features a 12-tooth design that helps control the chains 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