2-Pack 20" Fat Bike Tubes 20" x 4.0" AV33mm Schrader Valve Compatible with 20 x 3.5/4.0 E-Bike/Bicycle Tire Tubes

Still searching for the most durable bike inner tube? Stop looking up now and try ours. It will exceed your expectation! Features: Made To Last: The bicycle mtb inner tube is made with steady and durable butyl rubber. It shows amazing sealing performance, ozone resistant, anti-aging and electrical insulation merits. Size Available: The bike tube 20×3.5/4.0'. It fits tire width 3.5/4.0''. Comfort is the first: The replacement tires ensure better shock absorption for upgrade riding experience. Your safety and comfort is our top concern.