1.Size:6.00-9; ~ 2.Rim:4.00; ~ 3.Section width:146mm 4.Overall diameter:530mm 5.Certificate:N This type of tires is a improvement on the normal pneumatic solid tires,beside all the advantages of pneumatic solid tires.It also has the characteristics with good heat dissipation, well cushion performance, reduce the impact load to axle, improve vehicle safety and made the driving more comfortable etc ...