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I have to buy a new track pump. Every time I attach my cheap Axiom one to a presta valve, I have to hold it in place to get a seal. It's one of those push-on-and-flick-lever-over-90-degrees jobs.
Any out there with guaranteed leak-free presta fittings, ideally screw-on?
Tar.
I have a Silca pump. Wooden handle. Metal cylinder. Metal foot. Metal guage. Brass head. I've had this pump for 15 years and it does not leak as it does not have some faffy double head foolishness that only makes sense in a workshop.
The Lezyne ones have a screw-on fitting (apart from the cheapest one I think) - they look really nice too. I want one!
Topeak Joe Blow here, has "fancy" attachment that does both valve types with the one hole. Had it over 10 years without a problem.