Product Info: Part: Disc Brake Rotor Color: Black Rotor Style: Drilled and Slotted Center Hole Diameter: 67 millimeters / 2.64 inches Discard Thickness: 18.4 millimeters / 0.72 inches Nominal Thickness: 20 millimeters / 0.79 inches Outside Diameter: 330 millimeters / 12.