"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 3in. symmetrical hub, 3/4in. bearings and grease fitting. Rim Included Yes, Tire Type Flat free, Grease Fittings Yes, Hub Width in. 3, Bore Diameter in. 3/4, Rim Size in. 8, Tread Type Ribbed, Tire Size 3.50/2.50-8, Outside Diameter in. 13, Load Capacity lbs. 350, Bearings Included Yes."