Ridenow Bike Inner Tube, 2-Pack 700×18c-28c TPU Bike Tube with 85mm Metal Presta Valve, Super Light 24g & Puncture Resistant Bicycle Inner Tube(Include Bike Inner Tire Patch Repair Kits)

【Ultra-light Inner Tube】Made of thermoplastic polyurethane elastomer material (TPU), it weighs 70% less than ordinary butyl rubber inner tubes and takes up 50% less space when placed in the pocket, these bicycle inner tube weigh a mere 24g, the inner tubes are brightly colored, easy to identify, making it easy to carry and very suitable as a portable spare inner tube, 【New Upgrade】RideNow has implemented two enhancements to the original design. Firstly, we have replaced the lightweight plastic valve stems with metal presta valves on our Inner Tube. This modification ensures better air tightness and prevents any potential leaks. Moreover, the inclusion of a removable valve core allows for effortless maintenance and replacement of the air core whenever necessary. It is also compatible with threaded extension nozzles, providing more convenience for users, 【Enhanced Air Tightness】These road bike inner tube feature presta valves ensuring superior air tightness and reliability. Choose from 45mm/65mm/85mm valve lengths to suit your bike rim. Engineered for both disc and rim brake systems, these bicycle inner tubes cater to a diverse range of road vehicles. They excel in challenging racing and riding conditions, 【Fits Multiple Tire Sizes】This 700C Road Bike series Inner Tube is compatible with many tire sizes: 18/23/25/28c (Includes Bike Tube Patch Repair Kits). Ridenow offers three versions in weight for 700C Road Bike series Inner Tube: 24g、36g、39g, 【Proper Inflation Instructions】To prevent irreversible damage, avoid overinflating the inner tube when not installed in the tire. When installing, start with an initial inflation of 0.5 PSI, ensuring that the inner tube adheres closely to the tire's inner wall