Fits Multiple Tire Sizes: Suitable for 28'' Gravel & 29'' MTB bike,compatible with many Road Bike tire sizes: 700 x 32C/35C 37C/40C/47C,29'' Mountain Bike,Presta Valve Length 45mm. Package contains: 2*MTB inner tubes, 2*Tyre Levers,repair kit.
Material: The Gravel bike inner tube is made of high-quality TPU material, which is wear-resistant and more puncture-resistant. It can ride smoothly even on rugged mountains.
Ultra-light: The TPU Gravel bicycle inner tube weighs only 63g, which is about 200g lighter than the traditional butyl rubber inner tube, reducing the burden on the mountain bike, making riding more labor-saving and easier.
Compact and Lightweight: Bicycle tire inner tubes are compact, easy to store, and lightweight, making it convenient for you to carry with you. They take up very little space in your saddle bag.
Reduce rolling resistance: lighter and more delicate than the 300g ordinary Rubber .Produce less friction on the tire, effectively reducing energy loss during riding and making riding faster.
Note: The inner tube inflation pressure must not exceed 2 PSI before installation, otherwise it will deform or burst. If you encounter any problems, please ask us for help.