Flat-Free Polyurethane Foam Wheel, 225 lb Load Rating, Sawtooth Tread, 10 in Wheel Dia., 3 in Wheel Width, For Axle Size 5/8 in, 4.10/3.50-4, Standard Tire Rim Type, Center Mount Hub Position, 3 1/2 in Hub Length, Steel Hub Material, Yes Non-Marking