Winner of a Design and Innovation Award and MTBR Editor's Choice Award, Reserve's patented Fillmore valve represents a game-changing leap forward in technology, with a high-flow design that eases tubeless set up and eliminates the traditional, delicate, clog-inciting valve core of yesteryear. The Fillmore valves 3X air flow makes seating tubeless tires a snap and the Micro-Adjust feature allows you to perfectly dial in tire pressure. Sold as a pair.