Brake Drum
| GVW 6400, 7200 Lbs. | GVW 8400 Lbs. | GVW 10,000 Lbs. | ||
| Model | G | G | G | |
| Engine Type | Gas | Gas | Gas | |
| Power Assist Type | Vacuum | Vacuum | Hydraulic | |
| Drum Brake Diameter | Original | 11.15 Inch (in) | 13.0 Inch (in) | 13.0 Inch (in) |
| Maximum Refinish | 11.21 Inch (in) | 13.06 Inch (in) | 13.06 Inch (in) | |
| Discard | 11.24 Inch (in) | 13.09 Inch (in) | 13.09 Inch (in) |