Rotor Style: Plain. Kit Includes Bolt Circle: Front: 114.3mm (4.5″), Rear: 114.3mm (4.5″). FMSI Cross Reference: Front: D1211, Rear: D1212. Rotor Height: Front: 49.50mm (1.95″), Rear: 55mm (2.17″). Minimum Rotor Thickness: Front: 25mm (0.98″), Rear: 10.50mm (0.41″).