Still searching for the most durable bike inner tube? Stop looking up now and try ours. It will exceed your expectation!<br><br><b>Features:</b><br>Made To Last: The bicycle mtb inner tube is made with steady and durable butyl rubber.<br>The self-repairing inner tube is a thicker design, which is more durable than the normal inner tower.<br> The bicycle inner tube rolls through the tire repair liquid to automatically fill the punctured area. <br>After testing, the leak can be repaired within 3 seconds under normal conditions.<br> It shows amazing sealing performance, ozone resistant, anti-aging and electrical insulation merits.<br><br>Size Available: The bike tube 16''×1.9~2.125''. It fits tire width 1.9-2.125''. <br><br>Comfort is the first: The replacement tires ensure better shock absorption for upgrade riding experience. Your safety and comfort is our top concern.<br><br> ‍♀️【Please note】<br>Please note: <br>1. Because our inner tube is fluid, in order to prevent the Self Sealing liquid from flowing out during the installation process, please do not concentrate the center of gravity or the liquid near the air nozzle when the bicycle inner tube is inflated, which will cause liquid Squirting.<br><br> 2. General Self Sealing fluids will freeze at relatively low temperatures, which is not conducive to use in winter. Our Self Sealing fluid is not easy to freeze, and can be used normally at a temperature and not lower than minus 13 degrees, which is more applicable to the environment<br><br> 3. The Self Sealing fluid is only for repairing some small air leaks, and the effect of repairing large gaps or long gaps is not ideal<br>