Mechanical Specifications

Front Brakes (RPO JC4)
Rotor Discard Thickness * 27.50 mm (1.082 inch)
Rotor Minimum Allowable Thickness After Refinish 28.0 mm (1.10 inch)
Rotor Thickness (new) 29.0 mm (1.14 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Front Brakes (RPO's JF3/JF7)
Rotor Discard Thickness * 28.0 mm (1.10 inch)
Rotor Minimum Allowable Thickness After Refinish 28.0 mm (1.10 inch)
Rotor Thickness (new) 30.0 mm (1.181 inch)
Rotor Maximum Allowable Lateral Runout 0.05 mm (0.002 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Front Brakes (RPO JH1)
Rotor Discard Thickness * 27.50 mm (1.082 inch)
Rotor Minimum Allowable Thickness After Refinish 28.0 mm (1.10 inch)
Rotor Thickness (new) 29.0 mm (1.14 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Front Brakes (RPO JH6)
Rotor Discard Thickness * 36.50 mm (1.437 inch)
Rotor Minimum Allowable Thickness After Refinish 37.0 mm (1.46 inch)
Rotor Thickness (new) 38.0 mm (1.50 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Front Brakes (RPO JH7)
Rotor Discard Thickness * 36.50 mm (1.437 inch)
Rotor Minimum Allowable Thickness After Refinish 37.0 mm (1.46 inch)
Rotor Thickness (new) 38.0 mm (1.50 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Rear Brakes (RPO JC4)
Rotor Discard Thickness * 28.50 mm (1.122 inch)
Rotor Minimum Allowable Thickness After Refinish 29.0 mm (1.142 inch)
Rotor Thickness (new) 30.0 mm (1.181 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Rear Brakes (RPO JH1)
Rotor Discard Thickness * 18.50 mm (0.728 inch)
Rotor Minimum Allowable Thickness After Refinish 19.0 mm (0.748 inch)
Rotor Thickness (new) 20.0 mm (0.787 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Rear Brakes (RPO JH6)
Rotor Discard Thickness * 27.50 mm (1.082 inch)
Rotor Minimum Allowable Thickness After Refinish 28.0 mm (1.102 inch)
Rotor Thickness (new) 29.0 mm (1.141 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)

Rear Brakes (RPO JH7)
Rotor Discard Thickness * 28.5 mm (1.122 inch)
Rotor Minimum Allowable Thickness After Refinish 29.0 mm (1.142 inch)
Rotor Thickness (new) 30.0 mm (1.181 inch)
Rotor Maximum Allowable Lateral Runout 0.13 mm (0.005 inch)
Rotor Maximum Allowable Scoring 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation 0.025 mm (0.001 inch)
* 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 specifications.

Drum Brake Component Specifications
Maximum Allowable Diameter 296.5 mm (11.673 inch)
Maximum Allowable Radial Runout 0.06 mm (0.0024 inch)
Maximum Allowable Scoring 1.5 mm (0.06 inch)