Nukeproof universal presta tubeless valves pairthis pair of tubeless valves from nukeproof have been created to be compatible with tubeless tyre inserts. These valves benefit from a removable core, ensuring you can get the most airflow from your pump or cartridge. The head of these valves has also been designed to sit on top, enabling easier inflation and deflation. The custom cap has been specially designed and has an integrated core remover for removing and tightening the core without any additional tools. The nut has also been designed so that you can get a good grip on the flat edges to firmly tighten the valve on the rim.an o ring is included and sits against the outside of the rim to prevent damage to the rim.how to installremove valve cap and nut, insert valve through rim, fit o ring to valve then thread nut on and tighten by hand.featuresvalve type prestaincludes integrated valve core remover cap, o ring, removable coreeasy installationsold as a pairweight 12g per pairbuy nukeproof wheels tyres from chain reaction cycles, the world's largest online bike store.