What Makes the Tannus Armour the Best Fat Bike Insert?

The Tannus Armour Tire Insert sits between your tire and inner tube to deliver serious protection without sacrificing ride quality. With 15mm of top puncture protection and 2mm of sidewall shielding, it guards against flats from sharp rocks, debris, and rough terrain while dampening vibration for a smoother, more controlled feel. Designed for the 20 x 3.0-4.0 tire size, it fits fat bike, cargo bike, and large-wheeled e-bike setups that demand both durability and comfort on every ride.

Beyond flat prevention, the Tannus Armour delivers rim impact absorption on hard hits that would otherwise cause pinch flats or wheel damage. Its tube-type installation means no sealant or tubeless conversion needed, just slip it in alongside your existing inner tube and ride. Sized for 20 x 3.0-4.0 tires, it is built for fat bikes, cargo bikes, and oversized e-bikes where reliability on rough or loaded terrain is non-negotiable.