• Fat Bike Inner Tubes

    For daily commuting or riding on sand, snow, and loose terrain, tire reliability is critical. Explore our full range of fat bike inner tubes, engineered for low-pressure riding and designed to fit wide tires from 3.50 to 4.90 inches. From compact 20-inch folding e-fat bikes to large-diameter 29-inch fat bikes, with sizing shown in both inch and ETRTO standards, you’ll easily find the perfectly compatible inner tube for your tire — and ride with confidence.

Why Fat Bike–Specific Inner Tubes Matter

Fat bikes place very specific demands on inner tubes. With high air volume and very low operating pressures, the tube is heavily stressed — both while riding and during installation.

Our fat bike inner tubes are specifically designed to meet these requirements. Made from high-quality butyl rubber, they are engineered to:

  • reduce the risk of pinch flats at low pressure,
  • maintain consistent air pressure over time,
  • provide uniform elasticity, allowing the tube to perfectly match the tire’s shape without weak spots.

They are ideal for replacing a worn tube, preventive spare purchases, or regular fat bike maintenance.

The Right Size for Every Fat Bike

An inner tube is considered a fat bike tube when it is designed for tires 3.50 inches wide or more, regardless of wheel diameter.

Our catalog covers a very broad portion of the fat bike market. To choose the correct model, always check the size printed on your tire sidewall — in inches and/or ETRTO, with ETRTO being the most reliable reference.

16-Inch Fat Bike Inner Tubes

For tires: 16x4.00 (100-305) · 16x4.00 (102-305)

Commonly used on very compact fat bikes, often electric, as well as certain mini urban fat bikes valued for maneuverability.

20-Inch Fat Bike Inner Tubes

For tires: 20x4.00 (98-406) · 20x4.00 (100-406) · 20x4.00 (102-406) · 20x4.00 (103-406) · 20x4 1/4 (97-406) · 20x4 1/4 (108-406) · 20x4.50 (114-406) · 20x4.50 (115-406) · 20x4.80 (120-406)

Very common on folding electric fat bikes, urban fat bikes, and compact wide-tire bikes designed for comfort, rough pavement, and daily riding. Some tires may display alternative markings on the sidewall (e.g. 90/100-16 24B). To confirm compatibility, always rely first on the ETRTO number (e.g. 406), then on the inch size.

22-Inch Fat Bike Inner Tubes

For tire: 22x3.50 (90-457)

Typically mounted on unconventional or compact bikes with very wide tires, often built around comfort and stability.

24-Inch Fat Bike Inner Tubes

For tires: 24x3.50 (89-507) · 24x4.00 (100-507) · 24x4.00 (100/90-507) · 24x4.00 (102-507) · 24x4.00 (98-507)

Common on mid-size fat bikes, utility bikes, and certain recreational off-road setups.

26-Inch Fat Bike Inner Tubes

For tires: 26x3.50 (90-559) · 26x3.70 (95-559) · 26x4.00 (100-559) · 26x4.00 (102-559) · 26x4.00 (103-559) · 26x4.00 (97-559) · 26x4.00 (98-559) · 26x4.25 (108-559) · 26x4.40 (110-559) · 26x4.50 (115-559) · 26x4.70 (120-559) · 26x4.80 (120-559) · 26x4.80 (121-559) · 26x4.80 (122-559) · 26x4.90 (120-559)

The classic fat bike size, widely used on non-electric and electric fat bikes for trail riding, forest paths, sand, and snow.

27.5-Inch Fat Bike Inner Tubes

For tires: 27.5x3.50 (85-584) · 27.5x4.00 (100-584) · 27.5x4.00 (102-584) · 27.5x4.50 (110-584) · 27.5x4.50 (114-584) · 27.5x4.80 (122-584)

Often chosen for modern fat bikes seeking a strong balance between efficiency, comfort, and obstacle clearance — both analog and electric.

29-Inch Fat Bike Inner Tubes

For tire: 29x4.00 (100-622)

Designed for large-diameter fat bikes focused on rolling efficiency and stability while retaining the benefits of wide tires.

Performance by Riding Style

Compact & Urban Fat Bikes (16", 20", 22")

Ideal for folding e-fat bikes, commuting, and compact cargo setups, prioritizing maneuverability and low-pressure comfort.

Standard & Versatile Fat Bikes (24" & 26")

Perfect for trail riding, off-road use, sand, and snow — the core of recreational and sport fat biking.

Large-Diameter Fat Bikes (27.5" & 29")

Built for next-generation fat bikes emphasizing efficiency, stability, and rollover capability.

These inner tubes are suitable for many configurations:

  • non-electric fat bikes (recreation, touring, bikepacking),
  • electric fat bikes handling higher weight and torque,
  • utility bikes, cargo bikes, and balloon-tire cruisers.

How to Choose the Right Fat Bike Inner Tube

To avoid compatibility issues, always check:

  • wheel diameter (16", 20", 22", 24", 26", 27.5", 29"),
  • tire width (3.50 to 4.90 inches),
  • ETRTO size, which is more precise than inch sizing,
  • valve type, based on your rim and pump.

Pro tip: similar sizes (e.g. 20x4.00 vs 20x4 1/4) are not interchangeable. Always rely on the exact sidewall marking.

Expert Advice

With fat bikes, carrying a spare inner tube is strongly recommended. Trail-side repairs can be challenging due to the large surface area involved and environmental conditions such as cold, sand, mud, or moisture.

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