The X-Brake, Acerbis' newest front disc cover, provides unparalleled protection, strength, and good looks. Designed to keep sticks, rocks, and other debris from damaging or becoming tangled in the front rotor. Features ample venting to keep the brake cool in all conditions. Extended coverage also provides protection to the brake caliper. Constructed of durable polypropylene. Notes: ONLY fits stock hubs. Bike-specific aluminum mounting kit sold separately.