The Snap-on Workhorse Tire Changer is designed to service 90 percent of the most common tires and wheels. Features include high-speed inflation jets in the clamping jaws and a five-gallon external surge tank, which provide superior inflation pressure. It accommodates wheels up to 12 inches wide with a special rim clamp design allows outside-in or inside-out clamping, including an outside clamping rim diameter capacity of 10 to 18 inches and an inside clamping rim diameter capacity of 12 to 20 inches.