Fat Bike Tires & Inner Tubes – 20x3, 20x4 & 26x4 – Kasen Bikes

Fat Bike Tires, Inner Tubes & Tire Kits

Find replacement fat bike tires and inner tubes in popular e-bike sizes, including 20x3, 20x4, 20x4.5–4.8, and 26x4. Choose individual tubes, folding tires, or matched tire-and-tube kits for easier maintenance.

How to choose the correct size

Read the size printed on your current tire sidewall before ordering. Match the wheel diameter first, then confirm the supported tire-width range and valve type. A 20-inch tube cannot be used on a 26-inch wheel.

20x3: for compatible 20-inch tires around 3 inches wide
20x4: for common 20-inch fat tires approximately 3.5–4 inches wide
26x4: for compatible 26-inch fat-bike and e-bike tires

Need additional components? Browse all electric bike parts or shop our best-selling parts and bundles.

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20x3.5–4.0 fat tire inner tube with 32mm Schrader valve

20x3.5–4.0 Fat Tire Inner Tube with 32mm Schrader Valve

Folding Fat Bike Tire – 20x3, 20x4 & 26x4

20x3.0 fat tire e-bike inner tube with 32mm Schrader valve

20x3 Fat Bike Inner Tube – 32mm Schrader Valve

26x3.5–4.0 Fat Bike Inner Tube – Schrader Valve

26x4.0 Kenda Inner Tube for Kasen Fat Tire E-Bikes

Kenda 20x4.5–4.8 Fat Bike Inner Tube

26x4 all-terrain fat bike tire and inner tube kit

26x4 Folding Tire + Inner Tube Kit

Two 26x4 fat bike inner tubes with Schrader valves

26x4 Fat Bike Inner Tubes – 2 Pack

20x4 all-terrain fat bike tire and inner tube kit

20x4 Folding Tire + Inner Tube Kit

Two 20x4 fat bike inner tubes with 32mm Schrader valves

20x4 Fat Bike Inner Tubes – 2 Pack

20x3 all-terrain fat bike tire and inner tube kit

20x3 Folding Tire + Inner Tube Kit

Two 20x3 fat bike inner tubes with Schrader valves

20x3 Fat Bike Inner Tubes – 2 Pack

Fat Bike Tires & Inner Tubes – 20x3, 20x4 & 26x4