Marathon 2.80/2.50-4" Flat Free Hand Truck / Utility Cart Tire on Wheel, 3"Centered Hub, 1/2" Bearings 2.80/2.50-4" (8.5" diameter) with a 3" centered hub and 1/2" ball 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.