. Nukeproof Universal Tubeless Presta Valves have been designed to work with tubeless tyre inserts. The adapted head allows the tyre insert to sit on top of the valve but due to the shape of the head the tyre can still be easily inflated and deflated. These valves have a removable core allowing you to get maximum air flow from your tubeless pump or co2 cartridge Optimised Seal and Easy Installation. An O-ring is also provided which sits against the outside of the rim, this helps provide an airtight seal and prevents damage to the rim from the nut on the valve. For installation: Remove valve cap and nut, insert valve through rim, fit O-ring to valve then thread nut on and tighten by hand Features: Valve Type: PrestaEasy installationRemovable coreSold as a pairBuy Nukeproof Wheels & Tyres from Chain Reaction Cycles, the World’s Largest Online Bike Store.