Easy to use and convenient, a tire pressure gauge can be tossed in your glove box or center console. They don’t take up much room. You can get the simple, manual pencil-style gauges, round-face gauges, and digital gauges – check them out and see what works best from you, there is no “best” gauge.
To start, make sure you are checking the pressure in a “cold” tire, as friction from driving causes tires to warm up and alter the reading. To use your gauge, simply remove the tire stem caps and push the gauge onto the valve stem. You need to push it on tightly, and you should not hear any hissing sound coming out of the stem. If it’s hissing, make sure to be pressing down firmly and move the gauge around until there is no further hissing.
You may need to reset your gauge between tires – this could be as simple as pushing the sliding scale in your pencil gauge back in, or resetting your digital read-out. Check the manual for your gauge to see what is appropriate.
Also note that many air machines have a gauge or readout that will show your tire pressure. These can be used as well, but are not as convenient. With your own tire pressure gauge, you can do it at the pump while filling up, or at home in the comfort of your warm garage.