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Today Tannus launched the first tire insert on the market for fat bikes and e-fat bikes that protects from both punctures and pinch flats—something no competitor on the market currently offers.


“Since we launched the Armour system in 2019, we have received calls nearly every day asking about a system for fat bikes and fat tire e-bikes,” said Dave Ballard, CEO of Tannus America. “We took development seriously, and I can confidently say that there isn’t a better system to absolutely prevent flats for these riders.” 


Tannus Armour uses a foam insert that sits directly under the tire casing and wraps completely down into the rim. This provides 360 degrees of flat protection, covering the contact patch, sidewall and rim bed. Tubeless setups and other liners can protect some of these problem areas, but not all three. 


Tannus developed the fat-size Armour using feedback from riders who frequent snow and dirt as well as those who use e-fat bikes in the backcountry to hunt, explore or for utility purposes. Many of the bikes on the market for these applications do not use suspension, and without a reliable flat-prevention system on the market, many run high tire pressures, leading to a harsh ride quality. Armour allows for lower tire pressures in these applications, and functions as a run-flat solution in extreme scenarios where flats could occur.

By using a traditional tube, Armour does not require tubeless tape or sealant.

Tannus Armour is available at and in retailers worldwide.



  • Size: 26" x 4 - 4.8”
  • Weight: 550g
  • Price: $90 per set
  • Tube recommendation: 26x3-3.5
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