| JB6 | Brake Drum Discard Diameter | 11.24 Inch (in) |
| Brake Drum Maximum Diameter After Refinish | 11.21 Inch (in) |
| Brake Drum Inside Diameter (new) | 11.15 Inch (in) |
| Brake Drum Maximum Allowable Radial Runout | 0.006 Inch (in) |
| Brake Drum Maximum Allowable Scoring | 0.06 in |
| JD7 | Brake Drum Discard Diameter | 13.09 Inch (in) |
| Brake Drum Maximum Diameter After Refinish | 13.06 Inch (in) |
| Brake Drum Inside Diameter (new) | 13.00 Inch (in) |
| Brake Drum Maximum Allowable Radial Runout | 0.006 Inch (in) |
| Brake Drum Maximum Allowable Scoring | 0.06 in |
| JB8 | Brake Drum Discard Diameter | 13.09 Inch (in) |
| Brake Drum Maximum Diameter After Refinish | 13.06 Inch (in) |
| Brake Drum Inside Diameter (new) | 13.00 Inch (in) |
| Brake Drum Maximum Allowable Radial Runout | 0.006 Inch (in) |
| Brake Drum Maximum Allowable Scoring | 0.06 Inch (in) |