Developed specifically for SRAM 1X, X-ACTUATION keeps shifting sharp and consistent across the entire 10- to 42-tooth cassette and ZeroLoss, which simply means, well, zero loss‚ when you push on the lever, for an upshift or down shift, the cable is engaged instantly‚ zero loss of movement. There is no middle-ground where youre waiting for the shift to come. Gear changes are instant and precise.