Bibike 2/4 Pack Ridenow TPU Tubes 700x18-32c Inner Tube, 45/65/85mm Metal Presta Valve with Removable Core

Enhanced Air Tightness: These inner tubes feature metal valves instead of plastic ones, ensuring superior air tightness and reliability. The metal valves are also more corrosion-resistant. Special TPU Material: Made with TPU technology, these tubes weigh just 36g. They offer the perfect balance of durability and lightweight design. Versatile Size Range: The ultra-light road bike inner tube fits a range of tire sizes, including 700x18/23/25/28/32C, ensuring compatibility with various road bike tire sizes. Multiple Valve Length Options: With a choice of 45mm, 65mm, or 85mm Presta valves, you can select the valve length that best suits your needs. Inflation Caution: Avoid overinflating when not installed in the tire to prevent irreversible damage. During setup, start with 0.5PSI inflation, ensuring the inner tube adheres to the tire's inner wall. Avoid exceeding 5PSI in empty play to prevent irreparable expansion.