Marathon Universal Fit Pneumatic (Air Filled) Hand Truck / All Purpose Utility Tire on Wheel with Adapter Kit Included Fits most hand trucks and other utility equipment. Compatible with nearly every hub length and bearing size for tires measuring 10.2" in diameter (labeled as 4.10/3.50-4"). Features a load capacity of 300 pounds and a sawtooth tread for the perfect balance of traction and maneuverability. Comes with a 2.25" offset hub and bearings for a 5/8" axle pre-installed. Includes an adapter kit to fit hub lengths up to four inches and an axle size of 3/4". Adapter kit features: (1) 1/4" spacers, (3) 1/2" spacers, (2) 3/4" bushings, (1) 5/8" axle cap. Tube type design makes fixing a flat as simple as installing and inflating a new inner tube, instead of replacing the whole assembly.