PU-Foam Wheel Model: 4.00-8 Good design of patterns;All kinds of bearings,rims and ... .(mm) 16"x4.00-83909014016/18/20/25/35/36/... 1,Good design of tread pattern like smooth pattern,ribbed pattern ... ;3,Bearings and bushes with many sizes like 1/2",5/8",3/4",1" and other sizes;4, Angled grease fitting and ... quality;6,Competitive price;7,Good service. 16"x4.00-8 PU Foam Wheel