rubber wheel 410/350-4 1,tire :4PR 2,the valve of inner tube :TR87 3,ball bearing:6204Z (the diameter of the bearing : 20MM) 4,the rim with bolt and nut We can produce other size wheel : 200*50 6*2 250-4 300-4 325/300-8 350-4 350-6 400-4 400-6 400-8 400-10 and so on