The Stan's NoTubes Tubeless Universal Valves are an essential component for the cycling enthusiast, especially for those who prefer tubeless tires for their biking adventures. These valves are designed to fit a range of rim depths, from less than 20 mm to 26 mm, allowing compatibility with diverse bike models. They are also suitable for up to 8 mm valve holes, ensuring a secure fit and optimal performance. Sold as a pair, these universal valves are ideal for both replacements and upgrades, giving you an edge in navigating challenging terrains. So, whether you're hitting the trails or the city streets, trust in Stan's NoTubes to keep your ride smooth and efficient.