2-Pack 20×4.0-5.0 Fat Tire Bike Tubes: Heavy Duty Bike Tube with AV 32mm Schrader Valve, Compatible with 20x4.0 20x4 1/4 20x4.3 20x4.4 20x4.5 20x4.80 20x4.90 20x5.0 E-Bike/Road Bike/Mountain Bike

[Product Size]：20" x 4.0-5.0 Fit 20-inch wheel, tire width between 4.0-5.0inch, with a 32mm Schrader Valve for easy inflation. [High-Quality Materials]: Made from premium butyl rubber, these tubes ensure good air retention, preventing air leakage and providing a reliable and enjoyable ride. [Better Performance]: The high butyl rubber content offers better shock absorption, impact resistance, and puncture resistance, resulting in a smooth and comfortable ride on any terrain. [Easy Installation]: Each package includes two 20×4.0-5.0 inner tubes and two tire levers for convenient installation, making it quick and hassle-free to replace your old tubes. [Good Air Retention]: The rubber-coated valve stem comes with an enhanced seat seal that prevents the entry of sand and dust, ensuring a longer service life for your valves and maintaining optimal performance.

Specification: 

Size: 20x4.0-5.0 Inch; Suitable for 20" bicycle wheel tire 

Valve Type: Schrader Valve 

Valve Length: 32mm 

Tube Material: butyl rubber 

Package Include: 2-Pack 20x4.0-5.0 bike inner tubes and tire levers 

Note: Before installing, check to see if the inner tubes are completely sealed by putting them in water, if there are any bubbles, they are already damaged. We will provide a Free replacement to you soon. 

Warm Tips: 

1. Please kindly confirm the size of your bike tire before you buy. 

2. Before inserting the new tube, make sure to check for sharp/pointed objects inside or embedded in the tire, that could puncture the tube. 

3. Add a little air (to give the tube form) to the new inner tube before installation. This will prevent it from bunching up, causing a pinch flat or possibly forcing the tire off the rim. 

4. Place the valve through the hole in the rim. Valve should stick out at a 90-degree angle. Screw valve cap on tightly and securely. 

5. After installation, make sure the tube is fully inside the tire and not pinched between the tire and metal frame. Now you can inflate the tire to recommended pressure levels. Our AV Schrader valve inner tube is perfect for mountain bikes, gravel, city and electric bikes, offering seamless fit and functionality.