The series consists of three classes based on a competitor’s tire size, Unlimited Tire Class (45.5″ and up), Medium Tire Class (36″ – 45″), and the Small Tire Class (35.5″ and below).
SBS Events are action-packed races against the clock, with every competitor looking to score the fastest possible time through the designated mud pit for their class. When the run begins, drivers have up to five minutes to complete their timed pass through the mud holes triggering the electronic eye at the finish line that stops their time. If a competitor cannot complete their run through the mud, they’re scored based on the distance they’ve covered by the end of their run. At the end of the racing, drivers are scored in their class first by the fastest completed pass, next by distance traveled for those drivers that didn’t make it through their pit.