Battle Tested Bringing the first 2X10 MTB gearing and Avids full featured brake to the legendary X0 line gives you a product family ready for any XC, Trail, All Mountain, or DH battle. The X0 Ten Speed drivetrain, anchored by Truvativs full carbon crankset, takes advantage of XX technologies like X Glide shifting, X Dome cassettes, and wide range 2X10 gearing, while Avid X0 brakes dish out all the power and control you can handle. Its time to ride. 3 cage lengths: Short for DH, Medium for 2x10, Long for 3x10. Mount Options High Clamp Low Clamp 31.8, 34.9, 38.2. Low Direct Mount S1, S3, High Direct MountPull Top or Bottom Technology X Glide shifting technology.