Brakes and Traction Control: Specifications

Disc Brake Component Specifications (J55)

Front Brake Rotors
Rotor Diameter 330.0 mm (12.99 in)
Rotor Discard Thickness 36.0 mm (1.417 in)
Rotor Maximum Allowable Assembled Lateral Runout 0.05 mm (0.002 in)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Minimum Allowable Thickness after Refinishing 37.0 mm (1.457 in)
Rotor Thickness 38.00 mm (1.496 in)

Rear Brake Rotors
Rotor Diameter 325.00 mm (12.79 in)
Rotor Discard Thickness 27.5 mm (1.083 in)
Rotor Maximum Allowable Assembled Lateral Runout 0.05 mm (0.002 in)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Minimum Allowable Thickness after Refinishing 28.0 mm (1.102 in)
Rotor Thickness (New, J55) 29.0 mm (1.142 in)

* All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this specification. After refinishing the rotor, replace any rotor that does not meet the minimum thickness specification.

Disc Brake Component Specifications (JL9)

Front Brake Rotors
Rotor Diameter 323.0 mm (12.72 in)
Rotor Minimum Thickness 28.6 mm (1.126 in)
Rotor Maximum Allowable Assembled Lateral Runout 0.06 mm (0.002 in)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Thickness 30.0 mm (1.181 in)

Rear Brake Rotors
Rotor Diameter 292.00 mm (11.50 in)
Rotor Minimum Thickness 10.5 mm (0.413 in)
Rotor Maximum Allowable Assembled Lateral Runout 0.06 mm (0.002 in)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 in)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 in)
Rotor Thickness 12.00 mm (0.472 in)

* All brake rotors have a minimum thickness dimension cast into them. Replace any rotor that is worn or machined below this specification.