| Class | Engine teeth | Axle teeth | Class Weight |
| Midgets | 13 | 75 | 90kg |
| Rookies | 13 | 69 | 105kg |
| JNL | 12 | 74 | 120kg |
| JNH | 12 | 76 | 140kg |
| JC(w) | 10 | 75 | 140kg |
| JC(a) | 10 | 79 | 135kg |
| SNL | 12 | 73 | 140kg |
| SNH | 12 | 75 | 160kg |
| CL | 10 | 79 | 140kg |
| CH | 10 | 82 | 160kg |
| CSH | 10 | 85 | 180kg |
| O 40's Light | 12 | 78 | 140kg |
| O 40's Heavy | 12 | 81 | 160kg |
| RL | 12 | 77 | 160kg |
| RH | 12 | 79 | 180kg |
