Mow More Landscape Supplies offers Flat Free Tires in a variety of sizes. Flat free wheel is a unique micro-cellular polyurethane structure eliminates possible flats and distortion. This long lasting non-marking tire is extremely durable and lightweight. Manufactured using revolutionary casting process, the Martin Wheel "Eliminator" eliminates the need for maintenance. The unique micro-cellular polyurethane structure eliminates the possibility of ever going flat or losing form. No air, no flats, non-marking, oil resistant, solid tire.