... :steel/plastic 4.Bearing:16,20,15,19 PU foam tyre 250-4Our factory is one of the leading manufacturers of ... at any time ! More details:1.Model/typle: PU foam tyre, pneumatic wheel, solid wheel etc.2.Size : PU foam ... tyre(6x2,2.50-4,3.00-4,3.50-6, ... "x5.00-6,12"3.50-5,3.50-7,14"x3.50-8,16"x4.00-8,18"x6.50 ...