* EXACT ACTUATION㢠for fast and accurate shifts using SRAMÛªs 1:1å¨ actuation ratio (shifter cable travel: derailleur movement)* X-SYNC㢠pulley features a 12-tooth design that helps control the chainÛªs lateral movement* ROLLER BEARING CLUTCHã¢Ûªs one-way roller clutch controls chain tension for consistent shifting* X-Horizon㢠straight parallelogram design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force* Cage Lock㢠technology makes for fast wheel changes or chain installation