16''''*6.50-8 pu foam wheel.flat free wheel rim material:metalbearing diameter:25mm sealed bearing we produce foam wheel well16''''*6.50-8 pu foam wheel.flat free wheel rimmaterial:metal(plastic rim is ok) bearing diameter:25mm(differentsize is ok) we produce foam wheel well.good quality withcompetitive price. sizeas:6''''*2'''',250-4,300-4,350-4,300-8,400-8,500-6,16''''*6.50-8and so on.