Sram: With race-ready performance and technology, X5 components help off-road enthusiasts take it to the next level. With smooth, precise X-Glide shifting and legendary SRAM 10-speed performance, X5 brings out the best in any bike"e; and in every rider.ZeroLoss simply means, well, zero loss"e; when you push on the lever, for an upshift or down shift, the cable is engaged instantly"e; zero loss of movement. There is no middle-ground where you're waiting for the shift to come. Gear changes are instant and precise.