Helpful hints: In order to get a good seal, please put the tire’s air nozzle was up or off to the side. It’s best when the nozzle is around the 6 or 7 o’clock position so that you can firmly press the gauge straight down. This means you have to crane your head a bit to read the digital measurement, but the important thing is to be able to press down straight & hard onto the tire’s nozzle