Marathon 6x2" Flat Free, Hand Truck/All Purpose Utility Tire on Wheel, 2.375" Centered Hub, 1/2" Bearings Six-inch tire diameter and two-inch tire width with a 2.375" centered hub and 1/2" bearings This tire and wheel assembly is commonly used as a caster wheel on utility carts as well as small hand trucks (dollies) and other utility equipment. Comes pre-mounted on a solid steel, silver wheel for quick and easy installation. Has the same feel and handling of an air-filled tire, but guaranteed to never go flat. Features a load capacity of 250 pounds and a sawtooth tread for the perfect balance of traction and maneuverability.