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Disc Brake Component Specifications

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Application Specification
Metric English
Front Brakes
  • Rotor Diameter (16" Brake System)
 300.0 mm 11.810 in
  • Rotor Diameter (17" Brake System)
 321.0 mm 12.638 in
  • Rotor Diameter (18" Brake System)
 345.0 mm 13.583 in
  • Rotor Thickness New (16" Brake System)
 26.0 mm 1.023 in
  • Rotor Thickness New (17" Brake System)
 28.0 mm 1.102 in
  • Rotor Thickness New (18" Brake System)
 30.0 mm 1.181 in
  • Rotor Discard Thickness (16" Brake System)
 23.0 mm 0.905 in
  • Rotor Discard Thickness (17" Brake System)
 25.0 mm 0.984 in
  • Rotor Discard Thickness (18" Brake System)
 27.0 mm 1.063 in
  • Rotor Minimum Allowable Thickness After Refinish (16" Brake System)
 23.2 mm 0.913 in
  • Rotor Minimum Allowable Thickness After Refinish (17" Brake System)
 25.2 mm 0.992 in
  • Rotor Minimum Allowable Thickness After Refinish (18" Brake System)
 27.2 mm 1.071 in
  • Rotor Maximum Allowable Assembled Lateral Runout
 0.06 mm 0.002 in
  • Rotor Maximum Allowable Scoring
 1.50 mm 0.059 in
  • Rotor Maximum Allowable Thickness Variation
 0.025 mm 0.001 in
  • Brake Pad Thickness (16" Brake System)
 13.0 mm 0.512 in
  • Brake Pad Thickness (17" Brake System)
 12.5 mm 0.492 in
  • Brake Pad Thickness (18" Brake System)
 10.0 mm 0.393 in
  • Brake Pad Minimum Thickness (16" Brake System)
 2.0 mm 0.078 in
  • Brake Pad Minimum Thickness (17" Brake System)
 2.0 mm 0.078 in
  • Brake Pad Minimum Thickness (18" Brake System)
 2.0 mm 0.078 in
Rear Brakes
  • Rotor Diameter (16" Brake System)
 288.0 mm 11.339 in
  • Rotor Diameter (17" Brake System)
 315.0 mm 12.402 in
  • Rotor Thickness New (16" Brake System)
 12.0 mm 0.472 in
  • Rotor Thickness New (17" Brake System)
 23.0 mm 0.906 in
  • Rotor Discard Thickness* (16" Brake System)
 10.0 mm 0.393 in
  • Rotor Discard Thickness* (17" Brake System)
 21.0 mm 0.827 in
  • Brake Pad Thickness (16" Brake System)
 10.0 mm 0.393 in
  • Brake Pad Thickness (17" Brake System)
 11.0 mm 0.433 in
  • Brake Pad Minimum Thickness (16" Brake System)
 2.0 mm 0.078 in
  • Brake Pad Minimum Thickness (17" Brake System)
 2.0 mm 0.078 in
  • Rotor Maximum Allowable Assembled Lateral Runout
 0.05 mm 0.002 in
  • Rotor Maximum Allowable Thickness Variation
 0.025 mm 0.001 in
  • Rotor Maximum Allowable Scoring
 1.50 mm 0.059 in
  • Rotor Minimum Allowable Thickness After Refinish
 10.2 mm 0.402 in
* All brake rotors have a minimum thickness dimension cast into them. Replace any rotor that is worn or machined below this specification.
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