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This complete set of Pair of Dynamic Barkeeper Tubeless Valves is the best choice for all tubeless installations. The valves are easy to install and designed to be 100% compatible with all makes and types of wheels. CNC machined from 7075 aerospace-grade aluminum, with an innovative 5-hole design for optimal airflow and full insert compatibility. The 4 mm Allen key slot facilitates valve assembly and disassembly. Temperature, UV and ozone resistant. Works with all Presta floor and hand pumps.Details : 2 sets of alternative rubber bases, guaranteeing 100% compatibility. 2 additional spare black valve cores. 1 ultra-light purple valve cap with integrated valve core tool.Installation: 1. Remove valve cap, locking ring and O-ring from valve stem. 2. Choose the right rubber base for your rim. If your rim is curved, use the circular rubber base and select the correct width. If your rim is square, use the square rubber base. Make sure the base is slid all the way to the bottom of the valve before installation. 3. Push the valve through the rim's valve hole, from the outside towards the center. Place the O-ring on the end of the valve and slide it down until it rests on the rim. 4. Screw the locking ring onto the valve and tighten it against the O-ring and rim. 5. Use a 4 mm Allen key in the valve base to hold it in and push the valve base against the bottom of the rim. At the same time, tighten the locking ring until it is hand-tight. It's okay if the O-ring springs back slightly, this indicates that the seal is tight. Don't overtighten the locking ring to avoid leaks. 6. If you choose to ride with valve caps, choose the two black ones or replace one of them with the purple valve cap with the core removal function on the other wheel.
