I was having a pinch flat problem. Stupid me - I was going by my home pump gauge. It's low by about Ten pounds. Not much, but I don't inflate to the limit. It was enough for me to be getting pinch flats here and there on the rear wheel. Funny, but both my mini pumps are very accurate: a Road Morph and a Mini DX Master Blaster both with the inline gauge. They are both dead on. The Road Morph is the one I can get a road tire fully inflated with. The Master Blaster Gets me to about 65 - enough to be able to go find a real pump.