Product Info: Part: Brake Rotor Color: Black Rotor Style: Drilled and Slotted Center Hole Diameter: 67.4 millimeters / 2.65 inches Discard Thickness: 21.5 millimeters / 0.85 inches Nominal Thickness: 23 millimeters / 0.91 inches Outside Diameter: 315 millimeters / 12.