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 20" x 3.0-4.0"

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.

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.

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.

I've gotten 4 flat tires in 3 months, 2 this week only. This does nothing to stop staples from puncturing my tire. The only thing it's done is make it smoother to roll my flat bike to my destination. This product came highly recommended, but I couldn't agree less.

I thought the product was a bit pricy for what you got. You have to push this lining into your tire and make sure the bits that stick out either side are even because when you put your inner tube in it will fold over the inner tube. Make sure you half fill your inner tube before inserting it. You won’t be able to put as much air in the inner tube as you usually would. There are NO instructions I clouded with this. Do not trim the li we at all it is meant to fold over the inner tube