I was looking at pumps today at my LBS. I need a pump that will fill my tires to 110 psi. They had a pump that was rated to 80 psi max that the worker told me would be just fine to inflate up to 110.
How can a pump that's rated to 80 max psi inflate a tire up to 110? Wouldn't the back pressure blow the seals on the pump, or is there some kind of physics lesson I'm missing here?