Tannus Armour Tire Insert, Fat Tire Tube, No Flat Bike Tire Liner, Puncture Proof Tube Protector for E-Bikes and MTB
Condition: New
$75.90
Buy Now, Pay Later
As low as
$12.65
/ mo
Learn more
- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 5 left in stock, order soon!
Arrives
Nov 9 – Nov 11
Recently Viewed
At a glance
- Condition
- New
- Size
- 20" x 4.0-4.8"
- Model
- 20 x 4.0-4.8
- Color
- Red
- Material
- Foam
- Item Diameter
- 20 in
- Tire Type
- Clincher
- In the box
- Instructions
Features 5
- 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 1015 minutes per wheel, with no special tools requiredsimple to remove and reuse when changing mountain, gravel, fat tire, or e-bike tires and tubes
Description
Over 1,000,000+ riders are riding with Tannus Tannus Armour Tire Insert Tannus Armour Tire Insert Tannus Armour Inserts Bundle Maximum Flat Protection Blocks thorns, rocks and debris while protecting your tire and inner tube Maximum Flat Protection Blocks thorns, rocks and debris while protecting your tire and inner tube Complete 2-Wheel Bundle Includes two Tannus Armour inserts and two compatible inner tubes Patented Aither Foam Lightweight foam adds 15mm protection, sidewall support and vibration damping Patented Aither Foam Lightweight foam adds 15mm protection, sidewall support and vibration damping Bundle Up Against Flats Protect both wheels from thorns and pinch flats with patented foam inserts Run-Flat Confidence Helps prevent pinch flats and keeps you moving after a puncture or air loss Run-Flat Confidence Helps prevent pinch flats and keeps you moving after a puncture or air loss Run-Flat Support for Two Get run-flat capability, sidewall support and greater comfort on both wheels
Specs 19
| Item Diameter | 20 inches |
|---|---|
| Brand | Tannus |
| Tire Type | Clincher |
| Item Width | 4.8 inches |
| Bike Type | Mountain Bike |
| Warranty Type | Limited |
| Material | Foam |
| Wheel Size | 20 inches |
| Size | 20" x 4.0-4.8" |
| Number of Items | 1 |
| Brand Name | Tannus |
| Color | Red |
| Number of Packs | 1 |
| Unit Count | 1 Count |
| Manufacturer | Tannus |
| Model Number | 20 x 4.0-4.8 |
| Manufacturer Part Number | 20 x 4.0-4.8 |
| Tread Type | Knobby |
| Material Type | Foam |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 9 – Nov 11
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Similar Products
$6/mo*
Heavy Duty 20x4 E-Bike Tubes 20 x 4.0 Fat Tire Tubes 2-PCS
$2/mo*
Odyssey Air Supply Inner Tube 20" x 2.10-2.45" Schrader Valve
$22/mo*
16x4.0, 20x4.0, 24x4.0 26x4.0 inch Bike Fat Tire for E-Bikes
Top Amazon Reviews
Great value. Excellent quality.
Size: 20" x 4.0-4.8"
Installed on my wife’s HiKEEP today. Easy install for sure as long as you have the proper tools. The size was perfect for the 4.0” tires. Excellent value for the money as this is the second set I have. My other set is on my ebike with 4.5” tires. Extremely durable!
Reviewed in the United States on October 3, 2026 by Meghan
this solves your problems for sure.
Size: 26" x 4.0-4.8"
I was looking for security because I am a 60 year old disabled man and this bike is the only exercise I can do and if I get a flat, I can not walk and i have no one to save me. I would not be able to get home. I put this on and installation was easy and never had a flat after and was able to feel ok about going farther from home. This is what I needed and I was able to feel good about riding any where without worry of being stuck. You will not be sorry if you spend the little extra for this because it solves the problem that takes you here. Unfortunately for me, I was riding my bike and was struck by a tesla and I was in the street with my shoulder out of socket trying to get up because my knees were burning on the street,. I asked the driver to please help me my knees are burning and they sped off and left me. I never knew people could be like this to anyone. I had to lie on my side and roil myself over out of the street cuz it was a very busy main street and nobody even tried to help me They just waited for me to roil out of the way and someone got my bike and moved it and the wheel was all bent and now I am saving money for another bike because I cant walk and need exercise. I know I will put these inserts in my new bike when I can get one.
...
show more
Reviewed in the United States on June 11, 2026 by Stephen Williams
Must have for e-bikes
Size: 20" x 3.0-4.0"
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.
...
show more
Reviewed in the United States on April 18, 2024 by Michael
Disappointed Daily Commuting
Size: 20" x 3.0-4.0"
Very Disappointed After Daily Commuting I installed Tannus Armour tire inserts in both the front and rear fat tires because I wanted dependable puncture protection for my daily commute. I ride approximately 13 miles round trip every day and had high hopes that these inserts would make my bike reliable enough for everyday transportation. Unfortunately, on September 16, 2026, a small metal shard punctured my tire almost directly through the center of the Tannus Armour insert. When I removed the tire, I found the metal shard still lodged in the insert. I also noticed that the insert had lost a noticeable amount of thickness along the center where the tire makes the most contact with the road. I understand that no product can prevent every possible flat, but I expected better protection and durability, especially from a product marketed as “Armour.” Since the puncture occurred near the thickest and most important protective area, it left me very disappointed and questioning how well these inserts hold up under regular daily use. It’s unfortunate because I genuinely wanted this product to work. My goal was to use my bike as a dependable everyday ride to work, and I purchased inserts for both tires specifically for that peace of mind. Based on my experience, the center section appears to compress and wear down over time, leaving it more vulnerable to sharp objects.
...
show more
Reviewed in the United States on September 17, 2026 by joel diaz
Working but make sure you consider the tube
Size: 20" x 3.0-4.0"
Not quite as thick as I had hoped on the top, pics exaggerate it. I would definitely recommend if you have say a 20"x4" tire and tube, perhaps get a 20"x3" tube as it is a major beast to fit a good quality 4" tube into that reduced volume inside the tire. I got it to work somehow, but it took a lot of struggling, my tube was possibly a thicker type, but if I'd known how hard it would be, I would have bought a 3" tube.
...
show more
Reviewed in the United States on September 28, 2026 by Amazon Customer
Pricey but worth it.
Size: 20" x 3.0-4.0"
You must be patient getting these in and settling correctly but it's worth it. I used baby powder over the tube to reduce the friction while sliding them in. You can tell a bit of difference in the weight but I went all out getting these with heavy duty tires and heavy duty tubes and my ebike rides very smooth.
...
show more
Reviewed in the United States on August 13, 2026 by Chez
Great Quality Tire Protection (2nd review)
Size: 26" x 4.0-4.8"
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...
...
show more
Reviewed in the United States on April 11, 2026 by Steve Austin
Game changer to prevent flat tires on my bicycle!
Size: 20" x 3.0-4.0"
Least Tannus bicycle tire protectors outperform anything I've ever tried and believe me I've tried them all at 70 years old. I ride my bike with my brother and had to talk him into buying a pair after he got flat after flat. Now he's a believer too. Don't bother with anything else these are the one!
Reviewed in the United States on September 10, 2026 by Craig H Casey