PU-Foam Wheel Model: 3.00-4 Good design of patterns;All kinds of bearings,rims and colors; Top quality;Competitive price ModelOuter Dia.(mm)Width(mm)Hub length(mm)Hole Dia.(mm) 3.00-42607075-8116/18/20/25 1,Good design of tread pattern like smooth pattern,ribbed pattern,knobby pattern,sawtooth pattern,turf pattern,diamond pattern,lug pattern and so on ;2,You can choose the weight and the colour ...