Flat-Free Polyurethane Foam Wheel, 350 lb Load Rating, Sawtooth Tread, 10 1/4 in Wheel Dia., 4 1/4 in Wheel Width, For Axle Size 5/8 in, 4.10/3.50-4, Standard Tire Rim Type, Offset Hub Position, 2 1/4 in Hub Length, Steel Hub Material, Yes Non-Marking