10-speed was the road wave of the future a few years back, and now it's sweeping the mountain bike market too. As is their habit, SRAM has created another technological innovation in the X9 10 speed shifter set. Using tried and true SRAM mountain technology, these shifters use Exact Acutation technology, meaning the shifter moves the same distance with each shift. This gives you smooth, crisp, and precise shifting, which improves the riding experience more than you could possibly imagine. Ok, actually, that''s probably an overstatement, but it makes it pretty darn good. Also, these shifters are compatible with the new SRAM Matchmaker system, which allows you to mount your SRAM shifters and your Avid brakes all on one place on your handlebar. Neat!