Eliminate costly and inconvenient downtime with the Flat-Free Marathon 2.80/2.50-4 Tire and Wheel Assembly. The flat-free tire comes mounted on a powder-coated silver wheel with a 3" centered hub and 1/2" bearings. Compatible with many types of utility equipment, including utility carts using rigid or swivel casters. The tire is made of solid, polyurethane foam that has the same bounce and handling feel as an air-filled tire. Non-marking tires will keep working surfaces clean and will not deteriorate in the elements. Best of all, no hassle or maintenance for flats. The Marathon brand by Marastar features a full line of air-filled and flat-free tire and wheel assemblies for lawn and garden and commercial/industrial equipment. Count on Marathon for quality, easy-to-install products at a great value.