4.10/3.50-4 Air Filled Hand Truck/Utility Tire, 5/8" Bearings Installed,2.25" Product Description Universal Fit Flat Free Hand Truck Tire is made of solid polyurethane foam. No flat tires have the same bounce, feel, cushion, and performance as pneumatic (air-filled) tires. They are also non-marking and will not be affected by Ozone or UV rays. Airless Tires are made of lightweight, solid polyurethane foam and are to never go flat. Tire is 10. 5" in diameter, comes standard with a 2. 25" offset hub and 5/8" Ball Bearings. Includes adapter kit with additional bushings and spacers to fit your equipment - Adapter kit includes the following items: (1) - 1/4" Spacers, (3) - 1/2" Spacers, (2) - 3/4" Ball Bearings (5/8" installed), (1) - 5/8" Axle Cap From the Manufacturer 10.5" Tire diameter, 4.10/3.50-4" Universal Fit Air Filled Hand Truck Tire designed to fit most hand trucks and other small equipment. Mounted on a 4" steel rim with a 2.25" off-centered hub and 5/8" ball bearings. Includes adapter kit with additionals spacers and bushings. Adapter kit includes: (1) - 1/4" Spacers, (3) - 1/2" Spacers, (2) - 3/4" Bushing (5/8" Ball Bearings installed) (1) - 5/8" Axle Cap Fits most hand trucks and other utility equipment with 10-inch diameter tires, including 4.10/3.50-4, 10x3, 4.10-4, 3.50-4 and more. Tire dimensions: 10.2-inch overall diameter / 3.3-inch width - check your existing tire sidewall and specs for fit Features a load capacity of 300 pounds and a Sawtooth tread for the perfect balance of traction and maneuverability Comes with a 2.25-inch Offset hub 5/8-inch bearings (fits 5/8-inch axle) Installed. Includes an adapter kit with spacers to customize hub lengths to 4-inches and an axle size of 3/4-inches. Adapter Kit features: (1) 1/4" Spacers, (3) 1/2" Spacers, (2) 3/4" Bushings, (1) 5/8" Axle cap Low Maintenance and easy to use tube-type tire design makes fixing flats as simple as installing a new inner tube, instead of replacing the whole assembly