04-29-2019, 05:56 PM
My compressor has a hard enough time putting air in car tires. I can't imagine trying to use a floor pump on a car. 
miley-excited001:
I have a theory that dual-action isn't any better. I wondered about them, and disassembled my dual-action pump. There's two chambers in it - an inner and and outer. Each direction uses one chamber. Pushing one way pumps air into the tire, and sucks air into the other chamber. But that means the volume of each push is less. In fact, because of the chamber wall, two strokes with a single chamber pump will actually push a bit more air.
miley-excited001:freeradical wrote: Some floor pumps are dual action, and they can pump air into the tire on both the up and down stroke. Mine does not do that.
I have a theory that dual-action isn't any better. I wondered about them, and disassembled my dual-action pump. There's two chambers in it - an inner and and outer. Each direction uses one chamber. Pushing one way pumps air into the tire, and sucks air into the other chamber. But that means the volume of each push is less. In fact, because of the chamber wall, two strokes with a single chamber pump will actually push a bit more air.