Originally Posted by
eduskator
I have the Giant Control Tower Boost (not a cheap one at all) and it does it. As soon as I plug the head, I can hear the nice sound of air inside the tire pressurizing the pump's hose and the needle rising up like the sun every morning! It's like music to my ears.
Does yours have a universal head on it that'll service Presta and Schrader through the same nozzle? My pump does and it exhibits the same behavior; I'm thinking that it might be common or even necessary for that type of head.