- Pioneer Era (1967 - 1975)
o Characterized by early Burros and original Stroppes
o 2” shocks, 33” max tire size, swing axle buggies (35” tire for trucks)
- Legend Era (1976 - 1982)
o Characterized by early open class IRS buggies and stock trucks
o 2” shocks, 33” max tires (35” tire for trucks)
- Challenger Era (1983 – 1988)
o Type 4 & early Porsche 6 cylinder buggies and quarter elliptic trucks
o 2.5” shocks, 35” max tires
- Vintage Era (1989 – 1997, rolling 20 years old)
o Big engine buggies, racing transaxles, linked production based trucks
o Big modern shocks allowed, 37” max tires
- Historic Era (20+ year old tube frame trucks and truggys)
o A new era in pure tube frame unlimited trucks and truggys
o Unlimited class for 20+ year old machines
- Evolution Era (Modern machines)
o Multiple classes of modern racing machines
o Pro Unlimited class, race for cash |