Disc Brake Component Specifications

WARNING: This page is about a different car, the 2022 Cadillac CT5. 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	0.787 in
Front Brake Rotor - J56
Diameter	345.0 mm	13.582 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	0.59 in
Maximum Allowable Thickness Variation	.025 mm	0.001 in
Minimum Allowable Thickness After Refinish	28.0 mm	1.102 in
Thickness - New	30.0 mm	1.181 in
NOTE: Do NOT refinish brake rotor, only replace with NEW. Front Brake Rotor - J57
Diameter	400.0 mm	15.748 in
Discard Thickness*	37.64 mm	1.482 in
Maximum Allowable Mass Loss	150 g	5.291 oz
Maximum Allowable Assembled Lateral Runout	0.10 mm	0.004 in
Maximum Allowable Scoring	1.50 mm	0.59 in
Maximum Allowable Thickness Variation	.010 mm - 0.012 mm	0.00039 in - 0.00047 in
Thickness - New	38.0 mm	1.496 in
NOTE: Do NOT refinish brake rotor, only replace with NEW. Front Brake Rotor - J6H
Diameter	398.0 mm	15.669 in
Discard Thickness*	34.0 mm	1.339 in
Maximum Allowable Assembled Lateral Runout	0.07 mm	0.003 in
Maximum Allowable Scoring	1.50 mm	0.59 in
Maximum Allowable Thickness Variation	.010 mm - 0.012 mm	0.00039 in - 0.00047 in
Thickness - New	36.0 mm	1.417 in
Front Brake Rotor - JL9
Diameter	321.0 mm	12.638 in
Discard Thickness*	25.0 mm	0.984 in
Maximum Allowable Assembled Lateral Runout	0.05 mm	0.002 in
Maximum Allowable Scoring	1.50 mm	0.59 in
Maximum Allowable Thickness Variation	.025 mm	0.001 in
Minimum Allowable Thickness After Refinish	27.0 mm	1.063 in
Thickness - New	28.0 mm	1.102 in
Rear Brake Rotor - J56, JL9
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	0.59 in
Maximum Allowable Thickness Variation	.025 mm	0.001 in
Minimum Allowable Thickness After Refinish	22.0 mm	0.866 in
Thickness - New	23.0 mm	0.906 in
NOTE: Do NOT refinish brake rotor, only replace with NEW. Rear Brake Rotor - J57
Diameter	370.0 mm	14.567 in
Discard Thickness*	33.87 mm	1.333 in
Maximum Allowable Mass Loss	80 g	2.822 oz
Maximum Allowable Assembled Lateral Runout	0.10 mm	0.004 in
Maximum Allowable Scoring	1.50 mm	0.59 in
Maximum Allowable Thickness Variation	.010 mm - 0.012 mm	0.00039 in - 0.00047 in
Thickness - New	34.0 mm	1.339 in
NOTE: Do NOT refinish brake rotor, only replace with NEW. Rear Brake Rotor - J6H
Diameter	373.5 mm	14.704 in
Discard Thickness*	28.0 mm	1.102 in
Maximum Allowable Assembled Lateral Runout	0.04 mm	0.002 in
Maximum Allowable Scoring	1.50 mm	0.59 in
Maximum Allowable Thickness Variation	.010 mm - 0.012 mm	0.00039 in - 0.00047 in
Thickness - New	26.0 mm	1.024 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.