... 4" Detailed technical information:1.Tire Material = Solid Polyurethane2,Rim Type = plastic rim with roller ... Capacity = 100 kgsApplication and advantages:1. polyurethane tires Widely used on wheelbarrow, Lawnmower ,hand truck, and ... corrosion resistance and higher flow rate3. polyurethane tires with the benefit of never going flat 4 ... 16'',18'',20'',24'',26'' solid tires 10x3.50-4 for hand truck