Marathon 2.80/2.50-4" Pneumatic (Air Filled) Hand Truck / Utility Cart Tire and Inner Tube 2.80/2.50-4" (8.5" diameter), tire and inner tube, no wheel included. Compatible with a 4" rim. This tire is commonly used as a caster on utility carts as well as small hand trucks (dollies) and other utility equipment. Features a load capacity of 250 pounds and a jag tread for the perfect balance of traction and maneuverability. Tube type design makes fixing a flat as simple as installing on your existing wheel and inflating with a hand pump.