Galfer Disc Shark Rotors Ready To Bite If you're FINished with disc brake rotors that aren't ready for the most demanding terrain out there, then you're in the right place. The Galfer Disc Shark Rotors are ready to take a bite out of the trails. They are made from a proprietary mix of virgin high carbon 420 stainless steel and are laser cut. These rotors can seamlessly replace your stock rotors for exceptional performance. Features Made from a proprietary mix of virgin high carbon 420 stainless steel Laser cut for excellent precision Heated treated for maximum strength SPECIFICATIONSDiameter140mm, 160, , 180mm, 203mm, or 223mm Material High Carbon 420 Stainless Steel Intended Use XC, Trail, Gravity Weight N/A | Galfer | Disc Shark Rotors 203Mm