Review on LEZYNE Dual Valve Alternative Bicycle Pump Head: Presta, Schrader, & Dunlop Compatible for High-Pressure Tire Floor Pumps by Matthew Baltimore

I bought this for my Lezyne pump because the flip-threaded clamp that came with my model had a tendency to unscrew the removable valve cores. Now that most hoses come with removable valve cores, this is an ongoing problem. This new head, while not elegant in appearance, is solid, and it's quicker to flip the lever than unscrew the original cartridge. I'm glad I found it and made the transition - and I think Lezyne should make it a standard head. Bonus - I have kids with Schrader valved bikes - it's even easy to fill both Presta and Schrader tubes now.