TPU Inner Tube, Ultra-Light Inner Tube, 45mm Schrader Valve, 45/65mm Presta Valve, for Adult Bicycles or Mountain Bikes

【Wide Compatibility】This inner tube fits most mountain bikes and is compatible with several tire sizes: 29" x 1.90-2.50 and 27.5" x 1.90-2.50. It is equipped with a 45mm Schrader valve. Please check the markings on your tire sidewall before purchasing and choose the appropriate size. 【Ultra-Light and Portable】Made of TPU, our mountain bike inner tube is significantly lighter than traditional butyl rubber inner tubes. When folded, its volume is only 1/3 to 1/5 that of a standard inner tube, saving you half the storage space. Lightweight and portable, this is the ideal spare inner tube for mountain biking. 【Premium Material】The inner tube is made of TPU, a material that offers better puncture resistance than butyl and latex inner tubes. It is also flexible, abrasion-resistant, age-resistant, oil-resistant, and waterproof. Its low rolling resistance also makes pedaling easier. 【Practical Design】Our inner tubes feature a one-piece, leak-proof valve, ensuring excellent sealing, long-lasting air retention, and reducing the risk of leaks. The wall thickness is 0.2 mm ± 0.03 mm, providing a perfect balance of lightness, strength, and wear resistance. Our inner tubes withstand temperatures ranging from -40°C to 70°C, ensuring stable performance even in extreme conditions. [Easy Installation] Our inner tubes are easy to install, even for beginners. Before installation, inflate them slightly to a low pressure to prevent them from kinking or twisting. Keep the rim and the inside of the tire clean to minimize the risk of punctures.