These Tubeless Valve Stem Kits are fitted with Clik Valve cores. Clik Valve is an alternative tubeless valve core option to Presta. Advantages of Clik Valve include increased durability, increased air flow, and an intuitive click connection between the pump and the valve core. Tubeless Valve Stems for Clik Valve are compatible with tubeless rims that are drilled for Presta valves. They are available in 44 and 60 mm lengths, and in nine colors to match other Wolf Tooth anodized components. Just like the existing Tubeless Valve Stems for Presta, the new option for Clik Valve includes an oversized nut for easy grip, integrated valve core wrench, and two extra rubber bases. - Valve stem cap doubles as a Clik core removal tool - 44mm and 60mm stem length options - Slotted stem base for compatibilty with tire inserts - Oversized stem nut for better sealing and easier removal - Stem threaded below rubber seal for better performance on single wall rims - Three rubber bases included: two types of cones (one installed), one channel Compatibility - Tubeless Valve Stem Kits for Clik Valve are compatible with Clik Valve pump heads ONLY - For the best experience, pair with a Clik-compatible pump. In a pinch, a Presta pump head can inflate Tubeless valves for Clik Valve, but it is not recommeded for daily use.