Built with the rigors of cyclocross in mind, the Hayes CX-5 disc brake is made out of forged aluminum and polished to give it that eye-catching look. The CX-5 gives you the stopping power and modulation you can't achieve with traditional cantilever brakes. The CX-5 is available with a 160 mm or 140 mm rotor, included. Sold as a single brake caliper with rotor. Weighs 320 grams.