Bike Tire Liner, Inner Tube Bicycle Flat Protector Compatible with 12" 16" 18" 20" 24" 26" 27.5" 29"

I installed these tire liners on my bike and they’ve been a great upgrade. They fit a wide range of tire sizes and were easy to install—just measure, trim, and place them inside the tire. The material feels lightweight but durable, and it doesn’t affect how the bike rides. Since adding them, I’ve had much better protection against thorns, glass, and other trail debris. They give me extra peace of mind when riding and have already helped prevent flats. Overall, these liners are an affordable, simple solution for anyone looking to reduce punctures and keep riding without constant tube changes.

Great product NO more flat tires . Very happy ,easy to install I started with new tire and tube.

Good price for a liner, but a bit tricky to install if this is your first time doing it. This liner does not have adhesive backing on it to stick to the inside of the tire. So, be prepared to have wiggle the liner in between the tube and the tire. Tube should be inflated enough to have from, but not inflated enough for it to be difficult for the liner to slide in between the too. After cutting the liner to the correct size, make sure that it’s centered all the way around the tube. If it’s not and the liner is slid to one side in any area of the tire, the tire will wobble.

Simple, Affordable Protection from Flats I picked up this pair of JULAI Bike Tire Liners for my 29” mountain bike after getting tired of fixing thorn punctures on my local trails. They arrived neatly rolled up, lightweight, and easy to trim to size with scissors. The polyurethane feels sturdy yet flexible — it’s not flimsy like some cheaper liners that tend to fold or curl during installation. Once seated correctly between the tire and inner tube, these give you that extra layer of peace of mind on rocky or thorny paths. After a few weeks of riding mixed terrain (pavement, gravel, and dry brush), I haven’t had a single flat. They don’t noticeably change tire feel or add much weight, though installing them does require patience — they tend to roll back if you inflate too soon. My tip: inflate the tube halfway to help center the liner before sealing the bead. While they’re not as thick or advanced as heavy-duty liners used in desert riding or eMTBs, they’re ideal for casual and commuter riders who want basic puncture protection without spending big. Bottom line: Inexpensive, reliable liners that can spare you from mid-ride tube repairs. A solid upgrade for everyday cyclists who just want fewer flats and more ride time.

The Bike Tire Liner, Inner Tube Bicycle Flat Protector is a game-changer for cyclists who want to avoid the hassle of flat tires. This product is a reliable shield between your inner tube and tire, offering excellent protection against sharp objects like glass, thorns, or small debris on the road or trail. After installing the liners, I immediately noticed fewer flats, which means more time riding and less time fixing tires. The installation is straightforward, and once in place, the liners stay put without affecting the smoothness of the ride or adding unnecessary weight. It’s a small investment that provides peace of mind, especially on long rides or rough terrain. The liners are also durable, so you won’t need to replace them frequently. Overall, this tire liner is a must-have for anyone serious about cycling, whether for daily commutes or off-road adventures. It’s a simple but effective solution that enhances your ride by protecting your inner tubes and saving you from the frustration of frequent punctures. Highly recommended for cyclists looking for extra durability and protection!

I took a metal pick and lightly pressed it into this liner and it went through like butter. I've used a few different liners in the past and this one is pathetic compared to the rest. Just don't buy this.

They function well in my 29” Mountain Bike. No noticeable weight added or balance issues. I bought them to prevent Goat Head Thorn punctures.

FITS , GOOD QUALITY , DECENT WEIGHT , DURABLE , EASY TO INSTALL , IF YOU HATE FIXING FLATS GET ONE OF THESE .