We are producing inflate-free wheel, with plastic or iron rim, ball/roller bearing, hub ... hole according to customer's need. We are producing inflate-free wheel, with plastic or iron rim, ball/roller bearing, hub ... : 6"*2", 200*50, 2.50-4.2.50-6, 3.00-4.4.10/3.50-4, 3.50-5, 3.50-6 ... , 3.25/3.00-8, 3.50-8, 4.00-4, 4.00-6, 4.80/4.00-8, 5.00-6 6.00-6 ...