Originally Posted by
Wilfred Laurier
44.5 did try another pump, but this was likely operator error or some other problem. Pumps have check valves so the valve is not necessary to act as a check valve - it might make pumping less efficient for presta valves, but you can still get air in to a tube without the valve functioning... it will all escape as soon as you take the pump off, but it goes in in the first place.
How many angels fit on a pin head?
If the valve doesn't open, you can't get air in the tube. Point one for why you
need the valve. And if the valve doesn't function properly or is missing, you can't
keep air in the tube. The point is to put air in the tube
and to keep it there.
Originally Posted by
Wilfred Laurier
Malfunctioning valve that would let the pressure out when the pump was removed, so the pump was left in place for the ride home., essentially relying on the check valve in the pump to put the air in and keep it there.
Edit: If the video starts from the beginning, go to 24:24 to see what I am talking about.
That trick will only work if you have the right kind of pump. Most pumps are going to have thumb locks and those won't seal as well.
Originally Posted by
woodcraft
fify
It didn't need fixing. See above.