Acerbis X-Brake Vented 2.0 Front Rotor Cover The Acerbis X-Brake Vented 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 brake rotor all while providing fresh air flow to your rotor to prevent it from overheating. Features: Ample venting to keep the brake rotor cool in all conditions Extended coverage provides protection for the brake caliper Accommodates oversized rotors up to 270 mm  Constructed of durable polypropylene with a carbon fiber like texture Bike specific X-Brake Mounting Kit is sold separately