Join Date: Nov 2003
Bikes: Leader home built hardtail, Diamondback Response
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Originally Posted by CACycling
I don't believe there is a third option for valves on tubes so I am assuming it is a presta. It sounds like you are not seating the pump far enough on the valve to open it up. Make sure the lock nut is fully unscrewed and that you have the pump fully down on the valve.
It is not a good idea to press the pump down far enough to push on the rod in a presta valve. This is how the valve gets damaged and bent. Air pressure greater in the pump than in the tube will cause the presta valve to open. However, as mentioned in another post above, a quick tap with the finger to burp out some air before hooking up the pumb will unstick frozen valves.
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