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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brake System >> Specifications >> Disc Brake Component Specifications

Disc Brake Component Specifications

Application Specification
Metric English
Front Brakes
  • Brake Rotor Diameter (J60)
296.0mm 11.65in
  • Brake Rotor Diameter (J61)
321.0mm 12.63in
  • Brake Rotor Diameter (J64)
355.0mm 13.976in
  • Brake Rotor Discard Thickness* (J60, J61)
27.0mm 1.07in
  • Brake Rotor Discard Thickness* (J64)
30.0mm 1.181in
  • Brake Rotor Maximum Allowable Assembled Lateral Runout
0.05mm 0.002in
  • Brake Rotor Maximum Allowable Scoring
1.50mm 0.059in
  • Brake Rotor Maximum Allowable Thickness Variation
0.006mm 0.00024in
  • Brake Rotor Thickness New (J60, J61)
30.0mm 1.18in
  • Brake Rotor Thickness New (J64)
32.0mm 1.26in
Rear Brakes
  • Brake Rotor Diameter (J60)
292.0mm 11.50in
  • Brake Rotor Diameter (J61, J64)
315.0mm 12.40in
  • Brake Rotor Discard Thickness* (J60)
10.00mm 0.395in
  • Brake Rotor Discard Thickness* (J61, J64)
21.00mm 0.827in
  • Brake Rotor Maximum Allowable Assembled Lateral Runout
0.05mm 0.002in
  • Brake Rotor Maximum Allowable Scoring
1.50mm 0.059in
  • Brake Rotor Maximum Allowable Thickness Variation
0.006mm 0.00024in
  • Brake Rotor Thickness- New (J60)
12mm 0.472in
  • Brake Rotor Thickness- New (J61, J64)
23.0mm 0.905in
*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.