wheelbarrow tire 400-8, 350-8,325-8,300-8,350-10,400-6,250-4,300-4,350-4,we have our own factory. " ... the world. wheelbarrow tire 400-8, 350-8,325-8,300-8,350-10,400-6,250-4,300-4,350-4,we have our ... Material: Natural rubber and Butyl rubberInner Tube Rubber Percentage: 20%,30%,40% and more 2.3. Rim Material: Steel powder ... rim 3. Main Size:a) 16" x 6.50-8 b) 16" x 4.50-8 c) 16" x 4.00-8 d) 15" x ...