Brake Rotor/Disc: Specifications
Rotor ThicknessGM brake systems are identified by Regular Production Option (RPO) codes. For further information on RPO codes see Application and ID.
| RPO JB3, JD3* | RPO JB5, JD5, JB6, JD6* | RPO JB7, JD7* | RPO JB8* | RPO JF9* | |
| Nominal Thickness | 1.00 Inch (in) | 1.25 Inch (in) | 1.26 Inch (in) | 1.50 Inch (in) | 1.54 Inch (in) |
| Minimum Refinish Thickness | 0.980 Inch (in) | 1.23 Inch (in) | 1.23 Inch (in) | 1.48 Inch (in) | 1.48 Inch (in) |
| Discard Thickness | 0.965 Inch (in) | 1.215 Inch (in) | 1.215 Inch (in) | 1.465 Inch (in) | 1.465 Inch (in) |