Triple Threat competitions will feature special vehicles such as ATVs (all-terrain vehicles) and Speedsters (UTVs). ATVs are off-road machines built for performance. They are race-modified and powered by 450cc four-stroke engines, capable of 55 miles per hour.  Speedsters are another form of off-road sporting vehicle manufactured to maneuver over rough terrain and around obstacles. Powered by a 1000cc engine, they can reach 85 mph in open spaces. They are larger in width and length than an ATV and feature an enclosed cab with two seats. Their lower center of gravity allows for optimum agility.