Originally Posted by
fietsbob
It Does Not Matter .. When the pressure in the hose is Higher than the pressure in the Tube it will Open The (unstuck) check valve in the Stem.
S/V Auto valves have a spring in the valve core .. .. Kangaroos and Emus
I suggest Buying a Presta Valve Track Pump. Lezyne is nice quality
ok, i wanna see if i can sort this out before i decide to buy an air nozzle to suit a presta valve.
now, on this flat tyre the lock nut un-screwed i can move the stem in and out, is that an indication that the valve isn't stuck?