WTB Max-Flow Tubeless Valves Turn The Flow Up To The Max The TCS Max-Flow Tubeless Valves feature an insert-compatible base, increased bore diameter, an integrated valve core remover, and an ergonomically designed nut that allows riders to properly tighten down the valve without the use of a tool. TCS Max-Flow Tubeless Valves feature a castellated base for multi-directional air flow out the sides, therefore preventing the airflow restriction that can occur with a tire insert being pushed up against a traditional valve opening. The increased bore diameter helps seat tubeless tires and prevent clogging that would typically occur after pouring sealant through the valve. Features Increased bore diameter for an 84% increase in air capacity and reduces sealant clogging Valve core removal cap means searching for pliers is no longer needed Knurled Easy-Grip Nut with an ergonomic shape allows hand tightening | Wtb | Max-Flow Tubeless Valves 2 Piece | Black | Presta, 44Mm