Originally Posted by
icemilkcoffee
Do you guys have some magical pump heads where you can pull the head off without losing a bunch of pressure? Because every time I try to pull off my lever action pump head it loses probably >5 psi just from that. Rendering any kind of precise pressure experiments moot.
I just got a Lezyne floor pump with a head the screws onto the threaded part of the valve and doesn't press on Presta valve locknuts at all, so when you unscrew it the only air blowing out was what was in the hose. I got this pump because my 29 year old Blackburn floor pump kept blowing off the valve at 90 psi.
I also got a gauge, which I had to practice with before I could reliably check the tire pressure without losing 10 psi.