Tannus Armour Tire Insert
Near-bulletproof flat protection. A foam insert that lines your tire, runs with a tube, and lets you keep rolling even after a puncture.
Tannus Armour is a foam insert that sits between your tube and tire, protecting against pinch flats and punctures and even letting you ride home on a flat. It keeps the comfort of a pneumatic tire (unlike fully solid tires) while massively cutting flats — a big deal on heavy e-bikes where roadside repairs are a pain.
It adds a little weight and rolling resistance, but for commuters who can't afford to be stranded, or cargo bikes that are miserable to flip and fix, it's some of the best peace-of-mind money you can spend.
Where to buy
Two paths — match your spend to the build. Quality picks last longer and come with real support; affordable picks get you rolling for less. Always confirm fitment, voltage, and connectors for your bike first.
Quality picks
Affordable picks
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Pro tips from our test team
- Match the insert to both your tire width and rim — fit is specific.
- Especially worth it on cargo bikes that are hard to flip and repair.
- Adds some weight and drag — a fair trade for flat immunity on a commuter.