"Save both time and money with reliable, bulletproof solid polyurethane tires. Flat-free tires keep your equipment rolling over the toughest conditions any jobsite can throw at you, eliminating costly and inconvenient flat tires. These flat-free tires are non-marking and have the bounce and feel of pneumatic tires without ever getting flat. Blue color helps easily identify your trouble-free, flat-free portable equipment. Load handling characteristics are similar to air-filled tires, except now troublesome flat tires are a thing of the past. This wide, heavy-duty tire is the perfect replacement tire for wheelbarrows - performs like an air tire with NO FLATS Lightweight, solid polyurethane tire is mounted onto a 8in. steel rim, with 6in. centered hub, 5/8in. bearings and grease fitting. Rim Size in. 8, Hub Width in. 6, Tire Type Flat-free, Tire Size 4.80/4.00-8, Bore Diameter in. 5/8, Grease Fittings Yes, Bearings Included Yes, Tread Type Ribbed, Load Capacity lbs. 500, Rim Included Yes, Outside Diameter in. 15.6. Tire is non-marking and has the bounce and feel of a pneumatic tire without ever getting flat Wide, heavy-duty design Perfect replacement tire for wheelbarrows Solid polyurethane tire is mounted onto a strong 8in. steel rim"