CLASS 1 2WD Paddles and scoops allowed
CLASS 2 33" & under D.O.T. tires
CLASS 3 33.1" to 35" D.O.T. tires
CLASS 4 35.1" to 37" D.O.T. tires
CLASS 5 37.1" to 39" D.O.T. tires
CLASS 6 39.1" to 45" D.O.T. tires
CLASS 7 "OPEN CLASS" 54" & under D.O.T. tires (nitrous, twins, triples...