Armour Tire Insert, Fat Tire Tube, No Flat Bike Tire Liner, Puncture Proof Tube Protector for E-Bikes and MTB

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.

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...

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 .

If you have a 4 inch wide tire you're going to find these extremely difficult to install. The installation instructions are for a thinner tire , I think !! Terrible customer service and forget about any type of warranty, they make up unheard off rules so you can forget about getting any type of exchange or refunds. Another company that all it cares about is the Almighty dollar. Also the inserts stick like epoxy glue to the insides of your tire so you can forget about reusing them when you eventually have to replace your tire.

So I have a 20 inch by 4 electric bike! In the course of 7 days I managed to pop two rear tires. Unfortunately they do not make the solid rubber tires in the 20x4. They make them in 20x2 but not 20x4 so I was forced to purchase this in hopes that it would work and I would not pop anymore rear tires! I'm not worried about the front most of the wait on an electric bicycle is in the rear because it's a rear wheel motor. Now I just installed this yesterday and I took my electric bike on a half a mile trial run and it seems to be working properly. Time will tell whether or not this works or if I will pop another one. I will update my review in a couple of weeks and let you know how it's holding up! Now I did have to downsize an inner tube by one size meaning I have a 20x4 but I needed to purchase a 20x3 tube in order to give this insert the proper Roman needed. As I said in a couple of weeks I will update my review.

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.

This is my second time buying these tire inserts. They work wonders with my husband's ebike. He really likes them. They do prevent the tires from catching flats, so this is a worthwhile investment.

Works perfectly don't wait...don't buy another brand...just get this now.

No better protection for daily commute 5Star

De fácil colocación en pavimento binen el funcionamiento no e probado en terracerías

This product is fantastic ever since I put it on my bike. I have never had a single problem with going over anything. obviously within reason of course...

I have used this product before and am happy and have not had a flat thus far. First Bike had for a year and never had a problem. Second Bike just installed tannis liner so hope I get same results.

I purchased one insert as a trial since reviews were mixed as to how easy it would be to fit and what the ride would be like. In the event the fit was easy with my Schwalbe Smart Sam, Active, 2.60 tyres. Riding on the road I noticed no difference; over roots,, etc. it feels more comfortable. I've consequently ordered a second.