GBrakes Wave Floating Rear Brake Rotor For Harley Sportster GBrakes Wave Rotors are laser cut from a proprietary high-carbon 420 Stainless Steel that has been heat treated and parallel diamond ground to ensure a perfect surface. These rotors bolt directly in place of your OEM brake rotors and are lower weight with better heat dissipation. Features: 10.25 standard solid mount rear rotor is a direct replacement for OEM Constructed of non-recycled high carbon 420 stainless steel / 8 composite Full Floating design for optimum pad to rotor contact Laser cut for precision and heat treatment Parallel double disc ground to assure a perfect parallel flatness Heat treated to each specific application to prevent warping Cad-Cam designed Tested with a stress analysis program KBA and TUV approved Sold each