Disc Brake Component Specifications

WARNING: This page is about a different car, the 2004 Pontiac Grand Am and 2004 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

Application	Specification
Application	Metric	English
Caliper Bore Diameter-Front	60.0 mm	2.36 in
Caliper Bore Diameter-Rear	38.0 mm	1.50 in
Front Brakes
Rotor Discard Thickness*	24.7 mm	0.972 in
Rotor Diameter	278.0 mm	10.944 in
Rotor Maximum Allowable Assembled Lateral Runout	0.04 mm	0.0015 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 Refinish	24.9 mm	0.980 in
Rotor Thickness New	26.2 mm	1.031 in
Rear Brakes:
Rotor Discard Thickness*	9.0 mm	0.354 in
Rotor Maximum Allowable Assembled Lateral Runout	0.04 mm	0.0015 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 Refinish	9.85 mm	0.388 in
Rotor Thickness New	11.0 mm	0.433 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.