Providing the feel and load-handling characteristics of pneumatic (air-filled) tires, these solid, non-marking Flat-Free Wheelbarrow Tires are made of micro-cellular polyurethane foam, which is twice as strong as rubber. They will not dry out or crack, are nearly as light as air-filled tires with similar bounce and cushion; and have a dense outer skin that is chemical- and UV-resistant. Available in a variety of tire sizes ranging from 8 to 26 inches in diameter, they are made to accommodate yard carts, hand trucks, and riding mowers as well as wheelbarrows.