Size Circumference (cm) Weight (g) Recommended inner Pressure
Size 5 68-71 400-430 11~13 psi
Size 4 65-67 400-430 11~13 psi
Size 4 Junior 65-67 300-320 11~13 psi
Size 3 60.8-62 345-375 4~6 psi
Size 2 58-60 300-320 4~6 psi
Size 1.5 49-51 235-255 2-4 psi
Size 1 40-42 160-190 2~4 psi