... polyurethane wheels(pu wheels),truckle etc. Specification:rubber wheel 1)pneumatic and solid wheel2)palstic and steel rim3)rubber esispastic and PU ... )16inch : 16'x4.00-8, 16'x4.50-8, 16'x6.50-8, 16'x4.80-8, 16'x7.50-8, 12)18inch : 18'x8 ... .50-8, 13)20inch : 20'x2.125', 14)26inch : 26'x1.75', 26'x1 3/8'...milling wheel ,pneumatic wheel truckle wheel