Provide up to a 30% more stopping power than factory or factory-sized brake rotors Upgrades not only performance, but improves the style of your factory wheel Each kit includes an oversized 15" floating rotor, brake caliper adapter bracket and necessary chrome hardware Designed to work with factory fork legs. Will not work with Arlen Ness Hot Legs fork legs.. ROTOR 15" JAGD RGT SPKMNT