20*1.95 butyl bicycle tube 1. material: natural rubber/butyl ... 3.A/V, E/V, F/V,D/V avavailable 20*1.95 butyl bicycle tube 1. Various Size for motorcycle ... -18, 300-8, 90/90-10, 400-12, 400-8, 450-12, 2.75-14, 2.25-17, 325-16, 90/90 ... 350-16, 2.50-10, 300-21, 460-18, 250-14, 500-12, 110/80-17, 110/80-182. Material: 1) natural ... 125; 16X2.125; 18X2.125; 20X2.125; 24X2125; 26X2.125. 20*1.95 butyl bicycle tube