... tube 1. material: natural rubber/butyl 2.Various size & pattern 3.A/V, E/V, F/V,D/V avavailable 20*1.95 butyl ... , 90/90-10, 400-12, 400-8, 450-12, 2.75-14, 2.25-17, 325-16, 90/90-18, 350-16 ... ; 20X1.75/1.95; 22X1.75/1.95; 24X1.75/1.95; 26X1.75/1.95; 28X1.75/1.95; 12X2.125; 14X2.125; 16X2.125; 18X2.125; 20X2.125; 24X2125; 26X2.125. 20*1.95 butyl bicycle ...