PU-Foam Wheel Model: 4.00-8 Good design of patterns;All kinds of bearings,rims and ... ,You can choose the weight and the colour of the pu part;2,Plastic rim and steel rim with many sizes ... ,Bearings and bushes with many sizes like 1/2",5/8",3/4",1" and other sizes;4, Angled grease fitting ... quality;6,Competitive price;7,Good service. 16"x4.00-8 PU Foam Wheel