Specifically tailored for performance-oriented cross-country riders, the XRC 1501 Spline One wheels leave nothing to be desired. The lightweight, 30 mm wide carbon rims provide ideal support for modern XC tires. They roll on race-proven and super reliable 240 hubs with Ratchet EXP freehub, which, through cold-forged spokes and high-quality wheel construction, convert every bit of energy into forward motion. 29", 110/15 mm, Center-Lock, 30 mm.