The new 270 mm Solid Pulse Rotor is made by Galfer exclusively for Ride Engineering. The special grade stainless / iron alloy material is imported from Japan, manufactured in Spain, then imported to the U.S. and is a favorite among most of the top level motocross teams. Beware of cheap aftermarket rotors like those imported from China, the material used may hinder braking performance. This solid rotor is made to last, is very lightweight (1 pound, 1 ounce) and offers more stopping power than the previous stock disc. Includes the Ride Engineering 270 mm Brake Hanger. Sold as a kit. Note: It is recommended that you install new brake pads when installing a new rotor. Note: Brembo or Magura front master cylinders are NOT large enough to actuate the caliper. It must be used with an 11 mm master like a Nissin (2024+ Honda CRF450R) or BrakeTec (2024+ GASGAS MC450F).