Marathon 4.10/3.50-6" Flat Free, Hand Truck / All Purpose Utility Tire on Wheel, 2.25" Centered Hub, 5/8" Bearings 4.10/3.50-6" (12.5" diameter) with a 2.25" centered hub and 5/8" ball bearings. This tire and wheel assembly is commonly used on hand trucks (dollies), sprayers, garden carts / tow behinds, and other utility equipment. Comes pre-mounted on a solid steel, white 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 350 pounds and a sawtooth tread for the perfect balance of traction and maneuverability.