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. Sold individually. Notes: 270 mm hanger bracket is required if your bike's stock disc is smaller than 270 mm (most are) and is sold separately. It is recommended that you install new brake pads when installing a new rotor.