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How to Properly Put Air in Tires

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Should you be worried about those tires?  Inflated Tire

 

You’re not sure, but they might be looking a little low... That can’t be a good thing, can it? 

 

The answer is simple - you should always take active measures to avoid low air pressure in any of your vehicle’s tires. Not only does under-inflation put you at risk of a dangerous blowout, you also burn more gas when your tires are low. And if tires are not uniformly inflated, you risk alignment problems later down the road. 

 

Don’t know how to put air in your tires? Don’t worry — Simply follow the below steps to learn how to put air in car tires so that you can safely go about your day.

 

Check Your Tire's Pressure

Some things you just don’t want to eyeball. 

 

It’s a good idea to keep a tire gauge handy in your car for these types of emergencies. They are small and easily stored in cabin compartments, door slots and seat-back pockets. They range from a few dollars for a basic pencil-gauge to up to $50 high-end electronic digital readers with additional features. 

 

If you don’t have a tire pressure gauge on hand, don’t worry — you can gauge your tires at any gas station that has an air pump. 

 

Most tires in the United States are read in PSI — pounds per square inch. Your vehicle or tires may also read ideal pressures in KPA, or kilopascal. It’s important the reading of your gauge reflects the pressure target for which you’re aiming. It’s an easy mistake to make, but using the wrong units of measurement could lead to drastic over- or under-inflation. 

 

Determine the Ideal Pressure

If you don’t know the ideal air pressure for your specific vehicle, even the most accurate reading won’t do you much good. If you’re not sure of the target, there are three pretty easy ways to find out — the driver-side doorpost of your vehicle, your owner’s manual and the wall of your tire.
 
The trim tag inside of the door jamb of your car is the best option. Here, you will find your manufacturer’s suggested ideal pressure. Your next best option is the owner’s manual, which should have information regarding your specific make and model. But if you’ve bought a used car with aftermarket wheels, this information may be obsolete. 
 
The tire wall will tell you the maximum pressure. Make sure you inflate a few units below the maximum pressure. Driving will cause the tire to heat, the air inside to expand and the pressure to increase. By leaving a few pounds-per-square-inch in wiggle room, you ensure you stay below the maximum threshold. 
 
Make sure you get the correct information for all four tires. Most vehicles require uniform air pressure. But some large trucks and SUVs have different pressure for the front and back tires. 
 
It’s better to gauge the air pressure when the tires are cold. So if you do not have a gauge at home and have to measure the pressure after you’ve driven — at the gas station, for example — then make sure you factor the higher reading into your target pressure range.
 

Inflate Car Tires

Now it’s time to pump air into your tires!
 
You have a few options when it comes to actually inflating your tires: a professional automatic air compressor, a portable electric pump that plugs into your car’s 12v outlet, a pump at the gas station or a manual floor or bicycle pump. 
 
If you use a public air pump at the gas station, make sure you park so that the hose can reach all four tires. Most gas station air compressor pumps are timed, and it can be very frustrating to have to move your car in the middle of pumping — only to run out of air in the middle of pumping a tire! The majority of gas station air compressor pumps are also coin operated, so make sure to bring some spare change. Prices can range from a quarter to $1 or more for a few minutes. 
 
Remove the caps on the valve stems. Stow them away safely — try the fifth pocket of your jeans, your purse, the door handle — those guys blend in with the concrete or pavement, tend to roll downhill and are very easy to lose! 
 
Next, attach the hose to the valve stem. There are varying types of hookups. Some have a latch, some screw on, others are simply pushed over the stem. Whatever the attachment, make sure you don’t hear a hiss while pumping to ensure no air is escaping from the hookup. 
 
Filling each tire with air could take several minutes. 
 
Some gas station compressors and portable pumps have a continuous readout of the air pressure while the pump is in operation or a target shutoff. If not, stop to check the pressure while you’re filling. You don’t want to overfill, but if you do, simply press on the center pin of the valve to release a small amount of air to get back into ideal range.
 
Final step: Don’t forget to replace your valve stem caps! 
 
Make sure to check the air pressure in your tires at least once a month. If you find you one or more tires are consistently low, you may have a slow leak. If so, contact a professional to diagnose the problem and offer replacement options.
Categories: Tires 101 | View Count: (79) | Return

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