When it comes to checking the pressure of your tires it’s easy to be an expert, right?  You’d be surprised how many smart people get it wrong …

Start with frequency.  Tires should be checked once a month – more often if you sense that they may be low.  You’ve got to use a tire gauge – it’s impossible to determine a tire’s inflation level just by looking.  Designs of tires vary and their appearance can be misleading.  Timing is important too.  Don’t check tire pressure after you’ve been driving for awhile.  Anything beyond about 2 miles will affect (and inflate) the pressure level.  Instead, go for first thing in the morning or after the car’s been at rest for at least 3 or 4 hours.  You also need to be a little careful about gas station gauges – good in an emergency, but not always the most reliable.

Here’s another tip most folks don’t know.  Don’t inflate to the maximum levels printed on the tire.  They have nothing to do with your car’s specifications and are almost certain to be too high.  Check your owner’s manual or look for tire specifications on the information sticker that is often placed on the inside of the driver’s door, or the trunk or glove box. 

When it’s finally time to check the pressure, insert the gauge and press it firmly.  If you hear air escaping from the tire, you aren’t pressing hard enough.