Marathon 4.10/3.50-4" Pneumatic (Air Filled) Hand Truck / All Purpose Utility Tire and Inner Tube 4.10/3.50-4" (10.2" diameter), tire and inner tube, no wheel included. Compatible with a 4" rim. This tire is commonly used on air compressors, hand trucks (dollies), generators, pressure washers and other utility equipment. Features a load capacity of 300 pounds and a sawtooth 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.