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Tannus America

Tannus Armour 26 × 4.0 Fat-Tire Insert – Flat-Free Protection for Your Fat-Bike & E-Bike

Tannus Armour 26 × 4.0 Fat-Tire Insert – Flat-Free Protection for Your Fat-Bike & E-Bike

$66.00 USD
$80.00 USD $66.00 USD
Sale Sold out

Say goodbye to mid-ride flats and hello to carefree cruising on Iowa’s gnarliest gravel or your neighborhood greenbelt. The Tannus Armour 26 × 4.0 Tire Insert slips between your tube and fat-tire, wrapping it in a 360° multi-cell foam “helmet” that blocks thorns, glass, goat-heads, and rim-pinch impacts—so you can ride harder, run lower PSI, and still make it back for tacos.

Why Riders Love It

  • Stops 90 % of punctures with 15 mm of impact-absorbing Armour under the tread and 2–5 mm on the sidewalls — no more cactus spikes or pinch flats ruining your day. 

  • E-bike ready. The proprietary compound is torque-tested to handle high-powered motors and the extra weight of fat-tire e-bikes. 

  • Ride softer, grip harder. Lower your tire pressure for extra traction and silky comfort without risking snake-bites or rim dents. 

  • Rim-saving cushion. Armour eats up rock strikes, protecting expensive wheels on rough single-track or curb hops.

  • DIY-friendly install. Pops in with standard tire levers—no sealant mess, no special tools. (Tip: a quick spritz of soapy water makes it effortless.

Fit & Specs

Spec Details
Fits Tires 26” x 4.0 – 4.8” (fat-bike/fat-tire e-bike)
Minimum Rim Width 19 mm inner
Insert Weight ~480 g each (about the weight of a water bottle)
Tube Size Use a downsized 26 × 3.0–3.5″ tube for best fit
Sold Individually (order two per bike)
Run-Flat Note Run-flat mode is optimized for standard MTB sizes; fat tires gain huge cushioning but should be reinflated ASAP for full support.

From Your Friends at EzipNzoom

We’re a family-run shop in Des Moines, and we ride what we sell. Pick up in-store, or let us ship straight to your doorstep. Have questions about fit or installation? Call, text, or swing by—our crew is always stoked to help you Zip, Zoom, Repeat!

“Tannus Armour: because the only things you should be popping are wheelies.”

*Not all items are in stock in Des Moines. Please send us an email/call before you order for a pickup or check our In-stock page to see our full selection of Electric golf carts, LSVs, E-bikes, and other electric vehicle accessories.

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