The Gravel Tuff 16 in. Extreme Non-Flat Wheel is an innovative product with a weight capacity of 330 lb. - perfect for a wide variety of tasks. Eliminate the problems of damaged or flat tires with this alternative tire. This tire with a steel rim has a centered hub length of 3.9 in. This alternative tire is perfect for use as a replacement tire on hand trucks, wagons, dollies, and carts. The tire's bearing I.D. measures 5/8 in. with a hub width of 3.9 in. This unique and specialized design will not go flat -- even when not in use and when under a load after sitting for a period of time. The Never Flat Extreme Tire weighs only 6 lb. for convenient and effortless transport. The powder-coat finish on the hub resists corrosion for a long-lasting product.