| Class Name | Weight | Age | Spec. Tire |
| Briggs Jr. Sportsman 1 Lite | 250 | 8-10 | Dunlop DCM 450 Front & Rear |
| Briggs Jr. Sportsman 1 Heavy | 265 | 8-10 | Dunlop DCM 450 Front & Rear |
| Briggs Jr. Sportsman 2 Lite | 275 | 10-12 | Dunlop DCM 450 Front & Rear |
| Briggs Jr. Sportsman 2 Heavy | 290 | 10-12 | Dunlop DCM 450 Front & Rear |
| Briggs Restricted Jr. Lite | 310 | 12-15 | Dunlop DCM 450 Front 600 Rear |
| Briggs Restricted Jr. Medium | 320 | 12-15 | Dunlop DCM 450 Front 600 Rear |
| Briggs Restricted Jr. Heavy | 325 | 12-15 | Dunlop DCM 450 Front 600 Rear |
| Briggs Rest. Jr. Sprts. Medium | 320 | 12-15 | Dunlop DCM 450 Front 600 Rear |
| Briggs Animal Lite | 325 | 15-up | Firestone YFA 500 & 650 Front or Rear |
| Briggs Animal Medium | 350 | 15-up | Firestone YFA 500 & 650 Front or Rear |
| Briggs Animal Heavy | 375 | 15-up | Firestone YFA 500 & 650 Front or Rear |
| Briggs Animal Super Heavy | 400 | 15-up | Firestone YFA 500 & 650 Front or Rear |
| Briggs Animal Senior | 375 | 35-up | Firestone YFA 500 & 650 Front or Rear |
| Briggs World Formula Medium | 360 | 15-up | Bridgestone YHC 450 Front 710 Rear |
| Briggs World Formula Heavy | 385 | 15-up | Bridgestone YHC 450 Front 710 Rear |