Julai Fat Bike Tire Liners, Bicycle Inner Tube Protector, Fits 20" 26" 29" | 2 Pcs Fat Tire Puncture Proof Liners, 7.5Ft Length, Fit 26X4.0 Up To 29" Tires, Puncture Protection, Trimable, Easy Install

I've had these on my bike for a year now and they've protected my tires from the numerous goathead stickers in my journeys. They are hard to install (watch a youtube tutorial), but they protect well. A little tube sealant like Slime will give you the added security on the trail.

This thing is tough. I cut a swatch out and tried to press a nail through. I had a very hard time even twisting it. the installation is a bit tricky. deflate the tire but not all the way. it should have a quarter inch between the tire and tube. Warm the lining up slightly. this will help with sliding it in. You can even use some baby powder inside the wheel if you are having a hard time sliding it in. It will want to twist on you. just keep feeding it slightly about 1/4 of the way around the tire. go back and tuck the first section inside. keep preparing until you have it all the way slid into the tire.

I was noticing more and more my steering was off and my back end felt like it was slipping. I noticed I was getting a flat and THANKFULLY stopped. This thing fell out of my tire at 32mph and almost made me crash with traffic all around me. It had wrapped itself even more than shown on my hub (this was after backing it up quite a bit to get it to unwrap) and probably would’ve burned it up if I didn’t crash. My tube is ok. My tire is ok. IT SLIPPED OUT! I saw on the comments an easier way to put it in, by taping it to the inner tube, but as you can see that didn’t work. I DO NOT RECOMMEND. It’s too slick. It’s going to take someone’s life someday.

Very good product it works very well, but it is definitely not a one-man job. I had to buy some glue to glue it to the inside of the tire then I put another protector that is called. Tannus Armour Tire Insert Then I put the tire back on the rim then I put the tube in install the rest of the way pumped it up and have not had a flat tire since hopefully this is helped somebody

Installing this was a bit difficult. It was hard to keep lined up straight while installing. I've never used or needed a puncture liner on thinner tires, but I kept getting punctures with the fat 4" tires. After my 5th puncture i installed this and I haven't had any new punctures, so far. After cutting to length with about a 1.5" overlap, I also decided to round the corners, since it looked like the pointed corner would pinch into the tube and cause issues later. It was a pain to keep this thing properly lined up. I had to inflate the tire to seat it, but it would wiggle off during inflation, and I'd had to keep deflating it to adjust it. Eventually, I got it mostly in place with less wobble. The edges would wrinkle up because the roll comes flat and pulling into the curve of the tire. Be prepared to spend a lot of time trying to install this. It's not an easy install since it slips around in the tire while you attempt to inflate it. You have to keep adjusting it during inflation.

Literally impossible to make work, don't waste your money! I want to jump off a bridge after trying to make these fit.

It rubbed against my inner tube and created a small hole. As the inner tube deflates on his own, the inserts move around and if you don’t be careful, they can also move around and fold up.

Nice thick liner , very easy to cut with scissors to fit. So far so good.