Universal floating brake rotor in ''mount style B''; with counter bored 3/8" mount holes with a 3.25" BCD (Bolt Circle Diameter) and 56.3mm ID hub mount. Bolt-on installation for many front & rear stock or custom applications. Can be universally used on models with the stock 5-bolt H-D mount pattern with an inner hub diameter of 56.3mm. - High performance floating brake rotors designed to enhance braking performance and style of factory or aftermarket wheels- 420 Stainless steel construction; laser cut & drilled for optimum performance- Heavy duty stainless steel design made for the weight of heavy Tourings- Universal fitment- Can be installed on the front or rear of most H-D models with 5-bolt hub mounted factory rotors - 3/8" (9.5mm) counterbored mount holes- 56.3mm I.D.