Brake Pads - Harley-Davidson - RDP900 Developed with the aid of top works teams to perform at the World Superbike level, where an HH friction rating is required, Cream-colored, state-of-the-art zirconium based ceramic material on rear of backing plate works as heat shield in high-stress conditions to keep heat away from caliper piston and fluid, Designed to give maximum initial power, with fingertip control throughout the stop, Fade even in the harshest conditions, RDP Race pads are for race/track use only; not for street use. Any other use could result in death or serious injury., Not for use with HHI calipers.