Disc Brake Component Specifications

WARNING: This page is about a different car, the 2020 Cadillac CT4. 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 - 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	0.59 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
Front Brake Rotor - JE5
Diameter	300.0 mm	11.811 in
Discard Thickness*	23.0 mm	0.906 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	24.0 mm	0.945 in
Thickness - New	26.0 mm	1.023 in
Rear Brake Rotor
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
*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.