Depending on the event, SCCA Time Trials are open to street cars, racecars, and some special-built cars like Legend/Dwarf cars or Formula Cars and Sports Racers. Different events may have different allowances for what they let run, so it’s always good to look closely to make sure your specific car will be allowed. Motorcycles, go-karts and 3-wheel cars like the Can-Am Spyder and Polaris Slingshot are not allowed.