Knowing how to check your tire pressure is an important skill every driver should have. Proper tire pressure helps keep you safe on the road by ensuring your tires maintain optimal contact with the pavement, which improves handling, braking, and overall vehicle performance. It also helps maximize fuel efficiency, prevents premature tire wear, and reduces the risk of a flat or blowout. By understanding how to check your tire pressure, you can catch problems early and protect both your vehicle and your wallet.
Steps to Checking Your Tire Pressure
Properly checking your tire pressure isn’t just about routine maintenance—it’s about ensuring your safety, protecting your investment, and keeping your vehicle performing as it should. When your tires are inflated to the correct pressure, your car handles better, your tires wear evenly, and you get optimal fuel efficiency. Fortunately, this is a quick task that any driver can learn and do at home with just a few simple tools.
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Locate the recommended tire pressure for your vehicle.
Every vehicle manufacturer specifies an ideal tire pressure, expressed in pounds per square inch (PSI), that ensures proper performance, safety, and efficiency. You can usually find this information printed on a sticker inside the driver’s side door jamb or in your vehicle’s owner’s manual. Note that the correct PSI may vary between the front and rear tires, so it’s worth checking both values carefully. It’s a common mistake to refer to the PSI number printed on the tire sidewall—that number represents the maximum pressure the tire can hold, not the recommended inflation level for your specific vehicle.
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Check tire pressure when the tires are cold.
Tire pressure changes with temperature. When you drive, friction heats up the tires and causes the air inside to expand, resulting in a higher PSI reading. To get an accurate measurement, check your tire pressure first thing in the morning or after the car has been parked for at least three hours. This ensures you’re measuring the “cold” tire pressure, which is what the manufacturer’s recommendation is based on.
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Use a reliable tire pressure gauge.
There are several types of gauges available: digital gauges (easy to read and very accurate), dial gauges (which look like a clock face with a needle), and simple stick gauges (compact and functional but sometimes less precise). Remove the valve cap from the tire’s valve stem, press the gauge firmly onto the valve, and wait for the reading to stabilize. Ensure there’s a tight seal so no air leaks while checking; a brief hiss is normal, but if you hear continuous air escaping, reposition the gauge for a better seal.
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Check all four tires—and don’t forget your spare.
Each tire can lose air at different rates, so don’t assume they’re all the same. It’s important to check all four tires individually. If your vehicle has a full-size spare tire, include it as well. Many drivers neglect their spare until they need it—only to find it flat at a critical moment.
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Adjust the air pressure as needed.
If any tire is underinflated, use an air compressor to add air in small bursts, checking the pressure with your gauge after each adjustment until you reach the recommended PSI. If a tire is overinflated, press the small pin inside the valve stem to slowly release air and check the reading again until it falls within the correct range. Pay close attention when inflating tires in cold weather, as air expands when temperatures rise and could push your pressure above the recommended PSI on a warmer day.
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Replace the valve caps securely.
Once you’ve finished checking and adjusting each tire, screw the valve caps back onto all valve stems. These caps help keep dirt and moisture out of the valves, reducing the risk of leaks and preserving the integrity of your tires.
Why Should I Check My Tire Pressure?
Maintaining your car can seem like a major pain in the butt, but it’s also vitally important since most of us spend a lot of time in our cars and/or have plans to get every mile we can out of our cars. In the same way, keeping your tires in peak condition so you can get every mile possible out of them may seem inconvenient, but is vitally important both for the life of your tires and your safety. Getting every mile you can out of those tires starts before you even buy your tires by selecting the right tire for your car and driving style and ends when you tires show signs that it’s time for tire replacement.
So what do you do in the middle of the process to keep those tires in good condition and you safe? There are a few things you can do, including checking for alignment issues, regular tire rotation and checking your tire pressure on a regular basis.
Why is Tire Pressure important?
- Safety – Tires with improper tire pressure can cause handling and traction issues, which are dangerous especially during our Wisconsin winters. In addition, overinflated or underinflated tires are both vulnerable to unpredicted flats, which can cause you to lose control of your car or leave you stranded on the side of the road.
- Saves money. An underinflated or overinflated tire can accelerate the tread wear of your tires. With an overinflated tire, less of the tread is touching the road wearing parts of your tire tread more quickly. An underinflated tire does the opposite: more of the tire is wearing down faster. Either way, a tire not wearing properly leaves you vulnerable to blown tires and more frequent tire replacement.
- Smooth ride. Tires with too much pressure guarantee a bumpy ride. Underinflated tires give you a softer ride, but can cause handling problems.
- Gas mileage. Underinflated or overinflated tires can actually cost you more over the life of your car. That’s right. Tires with too much pressure or not enough decrease your gas mileage, making you stop at the pump more often.
What is the Proper Tire Pressure for my Tires?
Good question! A common misperception is that the tire pressure is on the tire. Not true! The proper PSI (pounds per square inch-tire pressure) is in your car’s owner manual or on a decal on the bottom of your door frame on the driver’s side.
It’s the first cold fall morning, and suddenly you’re faced with that annoying tire pressure light coming on; why? The weather plays a big part on the pressure in your tires. Hot weather may make your tires over inflate. However, very cold weather may cause your tires to be dangerously under inflated. It’s important to have the right air pressure in your car tires.
Each vehicle tire has a specific pressure measurement that will offer the best handling, the best gas mileage, and that will give you the longest life for those tires. This measurement is called the PSI, or air pressure “Per Square Inch”. On more recent vehicles the recommended pressure is listed on a sticker on the side of the driver’s side door. Most passenger cars recommend between 32 and 35 psi in the tires when they are cold, or after having been sitting still. When the car moves it creates friction in the tires and that generates heat. This heat increases the air pressure so depending on how far you were driving, how fast, how long, etc., your pressure can change. For this reason the best time to check is when it’s been sitting idle for a period of time. You can check the air pressure using a Do not inflate your tires to the pressure listed on the tire itself. That number is the maximum pressure the tire can hold, not the recommended pressure for the vehicle.
Seems tricky, right? Over-inflating your tires will give you a bouncy ride and an ill-handling car, while under-inflated tires can develop premature wear from increased friction. Either way, not having your tires at their recommended pressure will negatively affect tire wear and vehicle performance. If you aren’t sure or comfortable just bring it on by one of our locations in Lynchburg and we’ll do it for you!
How Often Should I Check my Tire Pressure?
Tires can actually lose or gain pressure with the seasons. Check your tire pressure seasonally, ask our mechanics to check your tire pressure at every oil change appointment.
Another opportunity is to check your tire pressure when you take your car in to the shop to have tires rotated and balanced. (if you’re curious as to how often that should be; check out our BLOG, here),