I just bought a Topeak Pocket-Rocket Master-Blaster frame pump, and was thrilled to see it arrived. I've never had Presta before, so I've been messing with the interchangeable heads on the pump, finding out that the valve itself has a little screw you need to undo, etc... Now I bought the Topeak pump because it has great reviews, but I can't inflate this tire to full pressure for anything. I've been at it for... thirty minutes?
I've got the valve unscrewed, I've got my pump setup for Presta, and I've got the thing locked to the valve. I can get maybe 75% air into the tire, but then I can hear the motherfu**er letting air out if I wiggle the pimp minutely while pumping. Is this to be expected from this piece of **** pump, or am I doing something horribly wrong?
please help me