Oversize Brake Rotor Design. Bolt-on design works with the stock hub pattern. Rotor shape promotes uniform brake pad wear – the same contact surface between the pads and disc every resolution generates regular wear. Less unsprung weight (up to 40% lighter than standard round rotors) reduces gyroscopic effect and improves the maneuverability of the motorcycle. Increased perimeter surface design generates more cooling surface around the rotor for better temperature dissipation. Brake caliper relocation brackets not included..