4.00-8 rubber wheel : 1 Model : Pneumatic Wheel 2 Rim : steel & plastic 3 Size : 16"x4.00-8 4.00-8 rubber wheel : Strengh: 1 High rubber content2 medium ... :1.Model/typle: PU foam tyre, pneumatic wheel, solid wheel etc.2.Size : PU foam tyre(6x2,2.50-4,3.00-4,3.50-6,3.50-4,3.50-5,4 ... .00-6,13"x3.25-8,13"x3.00-8,13"x5.00-6,4.80/4.00-8,etc ...