... ,high quality 4,timely shipment bicycle tire Our bicycle butyl tube are strong and elastic, and has been sold well abroad ... for many yearWe can offer valves for nature inner tube A/V, E/V. D/V. F/V ,G/V ... all kinds of inner tubes, including butyl and natural rubber tube. Size: 14x1.75/2.125, 16x1.75/2.125, 18x1.75 ...