<Li> Tractor unit (Semi tractor) </Li> <Ul> <Li> <P> Class 1 Light duty Toyota Tacoma </P> </Li> <Li> <P> Class 2 2001 Ford Excursion 4 × 4 (GVWR: 8,600 pounds (3.9 t) </P> </Li> <Li> <P> Class 3 Ford F - 350 </P> </Li> <Li> <P> Class 4 2008 Ford F - 450 4 × 4 pick - up truck (GVWR: 14,500 pounds (6.6 t)) </P> </Li> <Li> <P> Class 5 2005 Chevy Kodiak 4 × 4 (GVWR: 17,500 pounds (7.9 t)) </P> </Li> <Li> <P> Class 6 2002 Ford F - 650 in front (GVWR: 26 000 lb), 1989 Ford F - 600 in back (GVWR: 20,200 pounds (9.2 t) </P> </Li> <Li> <P> Class 7 Peterbilt 330 dump truck . </P> </Li> <Li> <P> Class 8 Kenworth W900 tractor with spread - axle 48 feet (15 m) refrigerated trailer . </P> </Li> <Li> <P> Class 9 Western Star 6900XD tractor . </P> </Li> </Ul> <Li> <P> Class 1 Light duty Toyota Tacoma </P> </Li> <P> Class 1 Light duty Toyota Tacoma </P>

How many tons in a truck and trailer