... and hole according to customer's need. We are producing pneumatic wheel, with plastic or iron rim, ball/roller bearing, hub and ... the size is as the below: 6"*2", 200*50, 2.50-4.2.50-6, 3.00-4.4.10/3 ... .50-4, 3.50-5, 3.50-6, 3.00-8, 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, 6.50-8 etc