20x4 Fat Tire Bike Inner Tubes with Schrader Valve

Heavy‑duty 20×4.0 fat tire inner tubes with standard Schrader valves. Built from thick butyl rubber for better puncture resistance and airtight performance. Ideal for fat‑tire e‑bikes, cruisers, and off‑road 20×4 setups. 

Each order comes with 1 tube.