GTL, UL LW SB, LW SB, LW GP, THUNDERBIKE, LW SS. LW F40. If your over 40 obviously. You can also run up in any class. Don't know why you would but u could. If your doing cmp I will see you down there. Ran in the meat grinder class for two years then picked up a sv for the team challenge race and never looked back. God I love racing these bikes!