Product Info: – Part: Disc Brake Rotor – Finish: Coated – Center Hole Diameter: 116.6 millimeters / 4.59 inches – Discard Thickness: 30.86 millimeters / 1.21 inches – Nominal Thickness: 32.8 millimeters / 1.29 inches – Outside Diameter: 317.5 millimeters / 12.