4.80/4.00-8" Flat Free Contractor Wheelbarrow Tire Material: PU Foam Color: Black, ... , Grey, Yellow etc. 4.80/4.00-8" Flat Free Garden Trailer Tire Tire Material = Solid Polyurethane Rim Type = Steel or ... , Green, Grey, Yellow etc.Tread: Ribbed, Smooth, and Knobby Flat tires are common on tow behind mower trailers and finding ... to contact us immediately, if you are interested in flat free tire above.