Ever notice your tire pressure light coming on more in the summer, even though you haven’t hit a single pothole? That’s not a coincidence. Hot pavement and rising temperatures actually change your tire pressure more than most drivers realize, and it’s worth understanding why before it turns into a bigger issue on the road.
The Simple Science Behind It
Air expands when it heats up, and that includes the air inside your tires. As outside temperatures rise and your tires heat up from friction and hot asphalt, the air pressure inside them goes up too. For every 10-degree jump in temperature, tire pressure can increase by about one to two PSI. That might not sound like much, but on a hot July day in Metro Atlanta, temperatures can swing enough to push your tires well above their recommended pressure.
Overinflated Tires Come With Real Risks
A lot of drivers assume more air pressure is safer, but overinflated tires actually reduce your contact with the road. That means less traction, especially when you need to brake quickly or handle a sudden rain shower, which Georgia summers are famous for. Overinflated tires also wear unevenly, with more wear down the center of the tread, which shortens the life of tires you probably just paid good money for.
Underinflated Tires Are Just as Dangerous
Here’s the part that catches people off guard. While heat raises pressure, tires that were already running low before summer hit can become a much bigger problem once things heat up. Underinflated tires flex more as you drive, which builds up heat inside the tire itself. Combine that with hot pavement and a long summer road trip, and you’ve got a real risk of a blowout, especially on highways where speeds are higher and tires are working harder for longer stretches.
Checking Your Pressure the Right Way
The most accurate tire pressure reading happens when your tires are cold, meaning before you’ve driven more than a mile or two. Checking pressure after a long highway drive on a hot day will give you a skewed number, since the tires have already heated up from friction. Your car’s door jamb sticker tells you the manufacturer’s recommended PSI, and that number should be your target no matter what the tire itself says as a max rating.
A Simple Habit That Prevents Bigger Problems
Checking your tire pressure once a month sounds like a small thing, but it’s one of the easiest ways to avoid a blowout, save on gas, and get more life out of your tires. It takes just a couple of minutes with a tire gauge, and it’s a habit worth building into your routine, especially heading into the hottest stretch of summer.
Let Us Take a Look
If you’re not sure what your tires should be running at, or it’s just been a while since anyone checked them, swing by any Speed Auto Repair location and we’ll take care of it. We’ll check your pressure, take a look at your tread, and make sure your tires are ready to handle the summer heat. Visit us in Alpharetta, Suwanee, Lawrenceville, Roswell, Johns Creek, Jasper, Cumming, or Buford, and let’s get you road-trip ready.