DESC: Solid, snappy and svelte, the SRAM X9 10-speed trigger shifters ensure reliable shifting for all your cross-country mountain bike adventures. Exact Actuation design takes the 1:1 actuation ratio of cable travel/derailleur movement and optimizes it for easy, dependable setup and 10-speed application. MachMaker compatibility lets you clean up your handlebar clutter with 1 tidy clamp. Compatible with SRAM Exact Actuation#174; rear derailleurs as well as SRAM double and triple front derailleurs.