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 is the perfect replacement tire for residential wheelbarrows and carts - performs like an air tire with NO FLATS Lightweight, solid polyurethane tire is mounted onto a heavy-duty 8in. steel rim, with 6in. symmetrical hub, 3/4in. bearings and grease fitting. Outside Diameter in. 15.5, Grease Fittings Yes, Load Capacity lbs. 450, Bearings Included Yes, Rim Size in. 8, Tire Type Flat free, Rim Included Yes, Bore Diameter in. 3/4, Tread Type Ribbed, Tire Size 15.5 in. x 4.80/4.00-8, Hub Width in. 6.