Disc Brake Component Specifications

WARNING: This page is about a different car, the 2022 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Application	Specification
Application	Metric	English
Disc Brake Pads - Front and Rear
Maximum Allowable Taper	0.15 mm	0.0059 in
Minimum Friction Material Thickness	2.0 mm	0.078 in
Front Brake Rotor - JL9
Diameter	321.0 mm	12.638 in
Discard Thickness*	26.0 mm	1.024 in
Maximum Allowable Assembled Lateral Runout	0.05 mm	0.002 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.001 in
Minimum Allowable Thickness After Refinish	27.0 mm	1.063 in
Thickness - New	28.0 mm	1.102 in
Front Brake Rotor - J55
Diameter	321.0 mm	12.638 in
Discard Thickness*	27.0 mm	1.063 in
Maximum Allowable Assembled Lateral Runout	0.05 mm	0.002 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.001 in
Minimum Allowable Thickness After Refinish	28.0 mm	1.102 in
Thickness - New	30.0 mm	1.181 in
Front Brake Rotor - J6G
Diameter	345.0 mm	13.583 in
Discard Thickness*	28.0 mm	1.102 in
Maximum Allowable Assembled Lateral Runout	0.05 mm	0.002 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.001 in
Minimum Allowable Thickness After Refinish	29.0 mm	1.14 in
Thickness - New	30.0 mm	1.181 in
NOTE: Do NOT refinish brake rotor, only replace with NEW. Front Brake Rotor - J6H
Diameter	390.0 mm	15.354 in
Discard Thickness*	34.0 mm	1.339 in
Maximum Allowable Assembled Lateral Runout	0.10 mm	0.004 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.001 in
Thickness - New	36.0 mm	1.417 in
NOTE: Do NOT refinish brake rotor, only replace with NEW. Front Brake Rotor - J6M
Diameter	370.0 mm	14.567 in
Discard Thickness*	32.0 mm	1.260 in
Maximum Allowable Assembled Lateral Runout	0.10 mm	0.004 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.001 in
Thickness - New	34.0 mm	1.339 in
NOTE: GM does NOT recommend any resurfacing of the park brake portion of the rear brake rotor. If light sanding will not remove the surface imperfections (rust/corrosion/pitting), the rotor should be replaced. Rear Brake Rotor - JL9, J55
Diameter	315.0 mm	12.402 in
Discard Thickness*	21.0 mm	0.827 in
Maximum Allowable Assembled Lateral Runout	0.05 mm	0.002 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.002 in
Minimum Allowable Thickness After Refinish	22.0 mm	0.866 in
Thickness - New	23.0 mm	0.906 in
NOTE: GM does NOT recommend any resurfacing of the park brake portion of the rear brake rotor. If light sanding will not remove the surface imperfections (rust/corrosion/pitting), the rotor should be replaced. Rear Brake Rotor - J6G, J6M
Diameter	339.0 mm	13.347 in
Discard Thickness*	24.0 mm	0.945 in
Maximum Allowable Assembled Lateral Runout	0.10 mm	0.004 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.002 in
Minimum Allowable Thickness After Refinish	25.0 mm	0.984 in
Thickness - New	26.0 mm	1.023 in
NOTE: GM does NOT recommend any resurfacing of the park brake portion of the rear brake rotor. If light sanding will not remove the surface imperfections (rust/corrosion/pitting), the rotor should be replaced. Rear Brake Rotor - J6H
Diameter	365.0 mm	14.370 in
Discard Thickness*	26.0 mm	1.024 in
Maximum Allowable Assembled Lateral Runout	0.10 mm	0.004 in
Maximum Allowable Scoring	1.50 mm	0.059 in
Maximum Allowable Thickness Variation	0.025 mm	0.002 in
Minimum Allowable Thickness After Refinish	27.0 mm	1.063 in
Thickness - New	28.0 mm	1.102 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 discard thickness specification.