---
product_id: 328531139
title: "Armour Tire Insert, Fat Tire Tube, No Flat Bike Tire Liner, Puncture Proof Tube Protector for E-Bikes and MTB"
brand: "tannus"
price: "$203.15"
currency: USD
in_stock: true
reviews_count: 13
category: "Tannus"
url: https://www.desertcart.us/products/328531139-armour-tire-insert-fat-tire-tube-no-flat-bike-tire
store_origin: US
region: United States of America
---

# Run-flat & pinch-flat defense Tool-free install in 10-15 mins 15mm patented Aither foam protection Armour Tire Insert, Fat Tire Tube, No Flat Bike Tire Liner, Puncture Proof Tube Protector for E-Bikes and MTB

**Brand:** tannus
**Price:** $203.15
**Availability:** ✅ In Stock

## Summary

> 🛞 Never flat, always fierce: Armor up your ride with Tannus!

## Quick Answers

- **What is this?** Armour Tire Insert, Fat Tire Tube, No Flat Bike Tire Liner, Puncture Proof Tube Protector for E-Bikes and MTB by tannus
- **How much does it cost?** $203.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/328531139-armour-tire-insert-fat-tire-tube-no-flat-bike-tire)

## Best For

- tannus enthusiasts

## Why This Product

- Trusted tannus brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Run-Flat Ready:** Keep rolling even after a puncture—no more stranded rides or emergency fixes.
- • **Quick & Tool-Free Setup:** Install or remove in under 15 minutes—no mechanic needed, just pure ride-ready convenience.
- • **Puncture-Proof Confidence:** Shield your ride from thorns, nails, and debris with 15mm of advanced foam armor.
- • **Ride Longer, Ride Smoother:** Experience vibration dampening and enhanced grip for fat tire, gravel, and e-bike adventures.
- • **Better Handling, Less Hassle:** Outperforms solid liners by improving control, stability, and comfort across all terrains.

## Overview

The Tannus Armour Tire Insert is a 26" x 4.0-4.8" high-tech foam liner designed to prevent flats on fat tire, gravel, and e-bikes. Featuring patented Aither foam technology, it offers 15mm of puncture protection, vibration dampening, and sidewall support. Its run-flat capability and pinch-flat defense let you ride confidently even with low or no air. Tool-free installation in 10-15 minutes makes it a must-have upgrade for serious riders seeking durability, comfort, and superior handling.

## Description

desertcart.com : Tannus Armour Tire Insert 26 x 4.0-4.8, Fat Tire Tube, No Flat Bike Tire Liner, Puncture Proof Tube Protector for E-Bikes and MTB : Sports & Outdoors

Review: Must have for e-bikes - This insert has performed very well in the month I’ve had it. In the 6 months I’ve had my bike I’ve had at least 7 flats and most were from little pieces of metal from the street cleaners bristles and small glass shards. All would barely break through the tire but with the weight on the back tire they’d cause a flat. Always the back; insert angry face!! The second day it was in I pulled a staple that went straight into the tire out and the day after that a 3/4” finishing nail that went in at a slight angle. Neither punctured the tube and what I would’ve spent on replacement tubes has already covered a decent portion of the cost of this. I can still find glass shards and fine metal pieces but I’ve stopped even looking after seeing it take the nail and not go flat. I’ve seen reviews about this not having instructions and that’s wrong. They’re literally embossed on the side of the insert. It’s a few simple steps; deflate tube, clean insert, put insert into tire, tire on bike, re-inflate. But honestly if you need more that that you probably shouldn’t be working on your own bike imho. The only thing that wasn’t stated was that you may have to trim this if your size falls within a range like mine 3-4” insert for a 3” tire, but that’s kinda common sense and if you held the insert against your tire without trimming you’d see it’s way over sized. For this I put the whole insert into the tire, traced where it touched the edge of the tire and then cut 1/8” inside that line to give the tire bead space to seat in the rim. Like magic the amount I cut off was very close to 1” Lastly I’d like to point out something about sizing. The 20x3” tube I first put on which is my bikes size was too big. I felt this as I put it on. There’s just too much rubber when this insert takes up 1/3 of the space in the tire. I did my best to stretch it out and have it fit smoothly in the tire but there seemed to always be a spot it bunched. Plus I couldn’t really pump more than 20psi into the tire despite the bike calling for a min of 24. I should’ve trusted my instincts but recall reading another review saying someone was a clown for saying you need to size the tube down. Well last week I got a flat, was still able to ride to a safe place to change as the insert doesn’t put your rim on the road and the flat was caused by a small pinch in the tube. Not even against the rim just a tiny fold in the center of the tube where it sat in the insert. I got the next partial size tube smaller; 2.75-3.3” and it fits much better and took the correct psi.
Review: Great Quality Tire Protection (2nd review) - I am changing this back to a Great 5 star review because this is a great quality product and Tannus shouldn't be criticized because they didn't do anything wrong, as it was an desertcart issue. Also these 26x4 are not easy to install but after having these professionally installed at a Specialized bike shop by a Specialized bike mechanic which costed an additional $195 on my electric bike the bike rides nicer and smoother then ever and so far NO FLAT TIRES... Thanks again for the High quality bike parts Tannus...

## Features

- NO FLATS, MAXIMUM PROTECTION: Tannus Armour tire insert works as a puncture-proof tire liner and bike tube protector, helping stop flats from thorns, goatheads, rocks, and debris while improving comfort on fat tire, gravel, and e-bike rides
- PATENTED AITHER FOAM TECHNOLOGY: Made from lightweight, high-tech multi-cell foam, this insert provides 15mm of top protection and sidewall support, delivering vibration dampening, better grip, and a smoother, quieter ride
- RUN-FLAT CAPABILITY & PINCH-FLAT DEFENSE: Ride with confidence knowing your tires gain run-flat support in case of a puncture and added protection against pinch flats, helping you finish your ride even with low or no air
- BETTER HANDLING THAN SOLID LINERS: Unlike solid rubber tire liners, Tannus Armour tire insert improves ride feel, control, and stability, supporting your bike tire and tube across different pressures while maintaining comfort, grip, and low rolling resistance for mountain, gravel, fat tire, and e-bike riding
- FAST, TOOL-FREE INSTALL: This Tannus Armour tire insert installs easily between your bike tire and inner tube in about 10–15 minutes per wheel, with no special tools required—simple to remove and reuse when changing mountain, gravel, fat tire, or e-bike tires and tubes

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08P3TTLHR |
| Best Sellers Rank | #44,775 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #186 in Bike Tires |
| Bike Type | Mountain Bike |
| Brand | Tannus |
| Brand Name | Tannus |
| Color | Red |
| Customer Reviews | 4.2 out of 5 stars 726 Reviews |
| Included Components | Instructions |
| Item Diameter | 26 Inches |
| Item Width | 4 Inches |
| Manufacturer | Tannus |
| Manufacturer Part Number | TA Insert |
| Material Type | Foam |
| Model Number | TA Insert |
| Size | 26" x 4.0-4.8" |
| Tire Type | Clincher |
| Tread Type | Multi-terrain or All-terrain |
| Unit Count | 1 Count |
| Warranty Type | Limited |
| Wheel Size | 26 Inches |

## Product Details

- **Bike Type:** Mountain Bike, Road Bike
- **Brand:** Tannus
- **Item Diameter:** 26 Inches
- **Item Width:** 4.8 Inches
- **Manufacturer:** Tannus
- **Material:** Foam
- **Size:** 26" x 4.0-4.8"
- **Tire Type:** Tubeless
- **Warranty Type:** Limited

## Images

![Armour Tire Insert, Fat Tire Tube, No Flat Bike Tire Liner, Puncture Proof Tube Protector for E-Bikes and MTB - Image 1](https://m.media-amazon.com/images/I/513JWzklj0L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Must have for e-bikes
*by M***L on April 18, 2024*

This insert has performed very well in the month I’ve had it. In the 6 months I’ve had my bike I’ve had at least 7 flats and most were from little pieces of metal from the street cleaners bristles and small glass shards. All would barely break through the tire but with the weight on the back tire they’d cause a flat. Always the back; insert angry face!! The second day it was in I pulled a staple that went straight into the tire out and the day after that a 3/4” finishing nail that went in at a slight angle. Neither punctured the tube and what I would’ve spent on replacement tubes has already covered a decent portion of the cost of this. I can still find glass shards and fine metal pieces but I’ve stopped even looking after seeing it take the nail and not go flat. I’ve seen reviews about this not having instructions and that’s wrong. They’re literally embossed on the side of the insert. It’s a few simple steps; deflate tube, clean insert, put insert into tire, tire on bike, re-inflate. But honestly if you need more that that you probably shouldn’t be working on your own bike imho. The only thing that wasn’t stated was that you may have to trim this if your size falls within a range like mine 3-4” insert for a 3” tire, but that’s kinda common sense and if you held the insert against your tire without trimming you’d see it’s way over sized. For this I put the whole insert into the tire, traced where it touched the edge of the tire and then cut 1/8” inside that line to give the tire bead space to seat in the rim. Like magic the amount I cut off was very close to 1” Lastly I’d like to point out something about sizing. The 20x3” tube I first put on which is my bikes size was too big. I felt this as I put it on. There’s just too much rubber when this insert takes up 1/3 of the space in the tire. I did my best to stretch it out and have it fit smoothly in the tire but there seemed to always be a spot it bunched. Plus I couldn’t really pump more than 20psi into the tire despite the bike calling for a min of 24. I should’ve trusted my instincts but recall reading another review saying someone was a clown for saying you need to size the tube down. Well last week I got a flat, was still able to ride to a safe place to change as the insert doesn’t put your rim on the road and the flat was caused by a small pinch in the tube. Not even against the rim just a tiny fold in the center of the tube where it sat in the insert. I got the next partial size tube smaller; 2.75-3.3” and it fits much better and took the correct psi.

### ⭐⭐⭐⭐⭐ Great Quality Tire Protection (2nd review)
*by S***N on April 11, 2026*

I am changing this back to a Great 5 star review because this is a great quality product and Tannus shouldn't be criticized because they didn't do anything wrong, as it was an Amazon issue. Also these 26x4 are not easy to install but after having these professionally installed at a Specialized bike shop by a Specialized bike mechanic which costed an additional $195 on my electric bike the bike rides nicer and smoother then ever and so far NO FLAT TIRES... Thanks again for the High quality bike parts Tannus...

### ⭐⭐⭐⭐⭐ Do NOT trim the armor BEFORE installation.
*by P***R on October 28, 2023*

Ok so its 10/28/23 here in the Chicagoland area. I recently purchased ( 2 ) of these for my fat bike . Buyer beware , your current tubes will not work . I went with the recommended 26x3.0 tubes & they worked splendidly. Now onto the install . I researched the fat bike install on YouTube, I watched 4 different installs . The Tannus armor official website says to trim them PRIOR to install and use baby powder , I personally did NOT do either. I figured I'd attempt to install them without a trim because I'm paying for 100% protection. I want 100% protection, worst-case scenario, I'd pop them out and trim them down if need be . Thankfully I didn't. Lets fast-forward the basics and go to install , I pumped about 3 or 4 pounds into the tube before I installed tubes into armor , line up the stem properly and install the first part into the rim. I was certain to push the armor back the the back of the rim , it makes for a smoother install for remaining tube/armor . Constantly watching to see that the tube or armor are not kinked or twisted or you'll have waddle ( unbalanced armor/tube ) . Once you have the tire on both sides of rim , set the tire down on the ground and roll it 10 or 15 feet ( prior to pumping remaining air pressure ) . Once you feel comfortable with this. Pump a few pounds and STOP ! Check ✔ both sides of the rim thoroughly on the bead to make certain there's no bulging. Then proceed to fill tire to recommended capacity. ( My fat tires say 20 lbs. Max ) I'm a big guy ( 6' 240 lbs. ) so I'm going with 20lbs. A short test run is recommended before any serious riding . Check both tires again thoroughly after. I read multiple reviews on these installs here on Amazon, one bloke said he was a retired engineer and he spent hours attempting to install these , finally took his bike to a bike shop. I was a bit perplexed by this. So I did MY own research. Its not rocket science, doesn't take any special skills or fancy tools aside from the usual tools needed to change a tire. Takes a bit of patience and a little elbow grease. I hope this review helps you. And PLEASE don't trim down & throw away good money if you don't have to. Good luck and be safe out there 🙏... P.S. the total time for both tires took me less than an hour. That's popping them off the bike , breakdown & reinstall. * UPDATE * It's now 12/23/23 . I have successfully ridden over 1500 miles on the Tannus Armor & ZERO flats ! I'm a daily commuter who rides in rain & snow . I have hit some pretty gnarly holes and bumps on the trails and the pavement and I've not had a single issue .

## Frequently Bought Together

- Tannus Armour Tire Insert, No Flat Bike Tire Liner, Puncture Proof Bicycle Tube Protector, Stops Flats from Thorns and Goatheads Compatible with E-Bikes, Mountain Bikes, and More
- Ultraverse 20x4.0, 26x4.0, 20x3.0, 26x3.0 Inner Tube Set with Schrader Valve-Ideal for Mountain Bikes & E-Bikes with 20/26-Inch Fat Tires-Durable & Reliable Performance 2 Pack with Tire Levers

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-21*