Originally Posted by
Iride01
Most bicycle floor pumps have a air chuck that can do either presta or schrader valves. Some you have to unscrew and flip the thing you just unscrewed
bkelly This is what I suspect is giving you your issue. Often it isn't obvious how the part that you remove and flip over in the head goes in for each type of valve.
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"It is the unknown around the corner that turns my wheels." -- Heinz Stücke