--- product_id: 433526859 title: "Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20\" x 3.0-4.0" brand: "tannus" price: "8306693₫" currency: VND in_stock: true reviews_count: 5 url: https://www.desertcart.vn/products/433526859-armour-tire-insert-puncture-proof-bike-tube-protector-for-gravel store_origin: VN region: Vietnam --- # tool-free, instant installation ultra-light high-tech polymer foam 15mm max puncture protection thickness Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20" x 3.0-4.0 **Brand:** tannus **Price:** 8306693₫ **Availability:** ✅ In Stock ## Summary > 🛡️ Ride fearless, ride smart—never let a flat slow your momentum! ## Quick Answers - **What is this?** Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20" x 3.0-4.0 by tannus - **How much does it cost?** 8306693₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/433526859-armour-tire-insert-puncture-proof-bike-tube-protector-for-gravel) ## 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 - • **Effortless Setup:** No tools, no hassle—install the Armor liner between tire and tube in minutes and get back on the road. - • **Adaptive Ride Comfort:** Smart density adjusts with tire pressure for shock absorption, grip, and low rolling resistance. - • **Extended Ride Security:** Supports tire shape at low pressure so you can keep rolling even if your tube fails. - • **Featherlight Durability:** Engineered from ultra-light, recyclable polymer foam that won’t weigh you down or harm the planet. - • **Puncture-Proof Confidence:** Patented Aither 1.1 foam shields your ride from thorns, goatheads, and cuts—ride worry-free. ## Overview The Tannus Armour Tire Insert is a patented, lightweight polymer foam liner designed to provide up to 15mm thick puncture protection for 20-inch clincher tires. Tool-free installation fits between tire and tube, offering adaptive shock absorption and grip by adjusting thickness with tire pressure. Reusable, recyclable, and compatible with gravel, fat, and e-bikes, it ensures a quiet, comfortable ride while preventing flats from thorns, goatheads, and other road hazards. ## Description The effective puncture protection system TANNUS Armor offers all-round protection against punctures, cuts and bruises! The system is installed very easily and without tools between tires (free choice of tires and tread pattern!) and tube. The outside of the hose is thus enclosed and thus protected. At the thickest point the puncture protection has a thickness of 15 mm, on the sides and in the rim area 2 mm. Depending on the tire pressure, the Tannus Armour changes its density and the thickness adjusts. If the air pressure drops, the Armour still acts against deformation and still offers high grip and low rolling resistance. It is therefore possible to continue driving at a reduced speed even if the hose is defective. The special high-tech polymer foam also provides good shock absorption while driving and the material is very light and recyclable. Another plus point is the reusability. ## Features - Made of very light high-tech polymer foam - patented Aither 1.1 technology - Very light weight, reusable and recyclable - Very simple and tool-free installation between bicycle tires and bicycle tubes - Quiet and comfortable driving experience - good shock absorption, good grip and low rolling resistance - Support for the entire tire: at low air pressure, the Armor acts against deformation and at higher pressure it adjusts its thickness ## Technical Specifications | Specification | Value | |---------------|-------| | Item Diameter | 20 Inches | | Brand | Tannus | | Tire Type | Clincher | | Item Width | 4 Inches | | Bike Type | Mountain Bike | | Material | Foam,Polymer | | Size | 20" x 3.0-4.0" | | Manufacturer | Tannus | | Batteries Included | No | | Material Type | Foam,Polymer | | Country of Origin | USA | ## Product Details - **Item Diameter:** 20 Inches - **Brand:** Tannus - **Tire Type:** Clincher - **Item Width:** 4 Inches - **Bike Type:** Mountain Bike ## Images ![Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20" x 3.0-4.0 - Image 1](https://m.media-amazon.com/images/I/513JWzklj0L.jpg) ![Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20" x 3.0-4.0 - Image 2](https://m.media-amazon.com/images/I/91eQFVvz5wL.jpg) ![Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20" x 3.0-4.0 - Image 3](https://m.media-amazon.com/images/I/71H93jpH8OL.jpg) ![Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20" x 3.0-4.0 - Image 4](https://m.media-amazon.com/images/I/61XO1W+VClL.jpg) ![Armour Tire Insert, Puncture-Proof Bike Tube Protector for Gravel, Fat Tire Tube and E-Bikes, No Flat Tire Liner Stops Thorns, Goatheads – Size: 20" x 3.0-4.0 - Image 5](https://m.media-amazon.com/images/I/61zXD6KdIKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Saves so much work on potential punctures, but follow instructions. *by C***D on Reviewed in the United States on 18 May 2022* Used on my son's RadRunner fat tire e-bike, several weeks later I was checking out his bike. I noticed construction staples stuck into the rear tire. (see pitures) no big deal, they were no long enough to go through the foam to the tube. I also removed 10-15 "goathead" stickers from each tire. Again, no big deal tubes un-touched, bike running fine.We run the tires at lower pressures, he has a smoother ride, and well, no punctures since adding them.Make sure you follow the Mfgr.'s instructions of replacing your tubes with smaller ones when installing. If not the full size tubes may compact the foam liner vastly decreasing it's effectiveness. Smaller tubes leave room for the foam to stay non-compacted and do it's job. ### ⭐⭐⭐⭐⭐ They work great for e bikes *by J***S on Reviewed in the United States on 8 November 2021* I have only had my tannus tire armor on for about a month. I have a 20”bye4” electric bike. I was getting flat tires like every two weeks. So I went with the tannus tire armor and so far no flats. Bye the way they are also easy to install it took me maybe fifteen minutes. ### ⭐⭐⭐⭐⭐ A REQUIREMENT FOR ALL E-BIKES *by A***N on Reviewed in the United States on 7 July 2022* These should be a requirement for all E-bikes cause taking off the back tires on any E-bike with the motor in it every time you get a flat is a hassle and annoying. With these guys you will never have to worry about a flat again.Pros:-Thick enough to stop 90% of what punctures your tires-Gives your ride a softer feel-Flats will be the LAST thing you will have to worry about.Cons:-For 3in x20in Ebike tires i had to cut the sides of the "Armour punctue" product shorter cuase they hanged too low and was making it hard for me to get the tire back on to the rim.It wasn't to hard though, all I had to do was put it inside the tire and mark all around the side where the tire end, and cut the extra off product. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/433526859-armour-tire-insert-puncture-proof-bike-tube-protector-for-gravel](https://www.desertcart.vn/products/433526859-armour-tire-insert-puncture-proof-bike-tube-protector-for-gravel) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-20*