• Fat Bike Inner Tubes

    Whether you ride daily on tarmac or venture onto sand, snow and loose terrain, the reliability of your tyres is crucial. Discover our complete range of fat bike inner tubes, specifically designed for low-pressure use and for wide tyres from 3.50 to 4.90 inches. From compact 20-inch inner tubes for folding e-fat bikes to large 29-inch fat bike tyres (inch and ETRTO sizes), easily find the perfectly compatible inner tube for your tyre and ride with complete peace of mind.

Why a dedicated fat bike inner tube matters

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

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

  • reduce the risk of pinch flats at low pressures,
  • maintain consistent air retention over time,
  • provide even elasticity, allowing the tube to perfectly conform to the tyre without weak spots.

They are ideal for replacing a worn tube, carrying a spare as a preventative measure, or for regular fat bike maintenance.

The right size for every fat bike

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

Our catalogue covers a wide range of the fat bike market. To select the correct inner tube, always check the size printed on your tyre sidewall—in inches and/or ETRTO, with ETRTO being the most reliable reference.

16-inch fat bike inner tubes

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

Typically fitted to very compact fat bikes, often electric, as well as mini urban fat bikes valued for their agility.

20-inch fat bike inner tubes

For tyres: 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-tyre bicycles designed for comfort, cobbles and daily commuting. Some tyres may display alternative markings on the sidewall (e.g. 90/100-16 24B). To confirm compatibility, always prioritise the ETRTO size (e.g. 406), followed by the inch size.

22-inch fat bike inner tubes

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

Often fitted to unconventional or compact wide-tyre bikes, or builds focused on comfort and stability.

24-inch fat bike inner tubes

For tyres: 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 leisure-oriented off-road setups.

26-inch fat bike inner tubes

For tyres: 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 both non-electric and electric fat bikes for touring, forest riding, sand and snow.

27.5-inch fat bike inner tubes

For tyres: 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 the right balance between efficiency, comfort and obstacle clearance—both electric and non-electric.

29-inch fat bike inner tubes

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

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

Performance by riding style

Compact & urban fat bikes (16”, 20”, 22”)

Ideal for folding electric fat bikes, commuting and compact cargo bikes, prioritising manoeuvrability and comfort at low pressure.

Standard & versatile fat bikes (24” & 26”)

Perfect for touring, off-road riding, sand and snow—these sizes form the core of recreational and sport fat biking.

Large-diameter fat bikes (27.5” & 29”)

Built for next-generation fat bikes seeking improved efficiency, stability and rollover capability, without sacrificing tyre volume.

These inner tubes are suitable for many setups:

  • non-electric fat bikes (leisure, touring, bikepacking),
  • electric fat bikes subjected to higher weight and torque,
  • utility bikes, cargo bikes and balloon-tyre 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”),
  • tyre width (3.50 to 4.90 inches),
  • ETRTO size, more precise than inch sizing,
  • valve type, depending on your rim and pump.

Practical tip: similar-looking sizes (e.g. 20x4.00 and 20x4 1/4) are not interchangeable. Always rely on the exact size printed on the tyre sidewall.

Expert advice

When riding a fat bike, carrying a spare inner tube is strongly recommended. Repairing a puncture on the trail can be challenging due to the large surface area involved and environmental conditions such as cold, sand, mud or moisture.

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