Sram x0 disc brake rotor bundlelean and mean at just 310 grams sram x0 brakes wont weigh you down when youre tackling tough terrain the smooth feel of the forged aluminum lever body combined with the svelte 2 piston caliper give you just what you need to push things a little bit further so whether youre inching your way down a sketchy chute or feathering the brakes through a head high berm x0 gives you the confidence to think less about your brakes and more about the task at hand