Universal Compatibility: Our bike tire puncture protector is compatible with a variety of tire sizes, including 12", 16", 18", 20", 24", 26", 27.5", and 29". Sturdy Protection: The bike tire insert provides reliable protection against punctures caused by thorns, glass, and nails, greatly extending the life of your tires. Easy Installation: This bike tire puncture protector liner can be easily cut to the desired length and inserted into the tire, providing a quick and easy way to make your tires more puncture-resistant. Durability and Reliability: Made of premium durable polyurethane, our bike tire liner ensures long-lasting and reliable puncture protection so you can ride safely and painlessly. worry. Essential Mountain Bike Accessories: In addition to its wide compatibility and robust puncture protection, the Bike Tire Liner is a must-have accessory for mountain bike enthusiasts who travel on demanding trails and need extra protection against tire damage.