Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
Or, hide this message:
temporarily or
permanently
Brake Rotor/Disc
GM brake systems are identified by Regular Production Option (RPO) codes. For further information on RPO codes see Application and ID.
| RPO JB5, JD5, JB6, JD6* | RPO JB7, JD7* | RPO JB8* | RPO JF9* |
| Nominal Thickness | 1.25 Inch (in) | 1.26 Inch (in) | 1.5 Inch (in) | 1.54 Inch (in) |
| Minimum Refinish Thickness | 1.23 Inch (in) | 1.23 Inch (in) | 1.48 Inch (in) | 1.48 Inch (in) |
| Discard Thickness | 1.215 Inch (in) | 1.215 Inch (in) | 1.465 Inch (in) | 1.465 Inch (in) |
| Thickness Variation (parallelism) | 0.0005 Inch (in) | 0.0005 Inch (in) | 0.0005 Inch (in) | 0.0005 Inch (in) |
| Run Out (TIR) | 0.004 Inch (in) | 0.004 Inch (in) | 0.004 Inch (in) | 0.004 Inch (in) |