You will want to take a trip to the auto parts store, and buy a tire pressure gauge. A person will want to maintain it in your car, and look at your pressure every few weeks, particularly if you use the vehicle a lot or are in a hot dry climate. While most likely at the store, buy a tire depth gauge and get the required depth of you auto tires from the clerk. If your tires are worn you will get much the same driving sensation and loss of control, especially at higher rates of speed. And by using a penny to try and gauge the correct detail of you treads is merely plain dangerous. Get a proper measurement tool and do it correctly.
Anyone who owns a car also needs to own a car tire pressure gauge. Tire pressure gauges are being used to determine the air pressure that is in each tire. It is useful for any type of wheels from bicycles all the way to trucks.
Stress gauges come in several styles. The one most individuals have has a ball at one end and a lengthy pencil like form with a slide that springs out when checking air pressure. The ball like area is a piston that fills with air from the tire when inserted into the tire valve. When measuring it pops the slide away and you could see how much pressure is inside the tire. You can also get the type that has a dial that looks relatively like a clock. There are also digital pressure features where the number is shown on a display.
Pressure gauges are relatively easy to utilize. On the side of the wheel close to the hub cap you will find a stem or a valve. There is usually a tiny cover that just twists off. Remove the cap and insert the gauge pressing in securely. You will hear a little escape of air and you will remove the gauge and find out what the pressure is. It is recommended to check the portable tire inflator with gauge before the vehicle has been running. This will give you a better reading.
Not every tire takes the same amount of pressure. It often will depend on the wheel size and how heavy the vehicle is. An individual can find requirements on a sticker that is usually yellow in color and positioned in the door jam of the car door on the side of the driver. Sometimes pressure requirements are printed right on the tire on the aspect wall. Other places manufacturers conceal the sticker is under the door for the fueling area and the glove compartment. PSI is the increment by which air pressure is measured. It means pounds per square inch. Most car wheels take about 30 to 40 pounds each car tire.
If tires are under-inflated you use much more fuel than if they were filled correctly. In case they are over stuffed you run the danger of having a blowout. In the winter it is often a practice to slightly under increase tires so that when in contact with winter elements they will stop better. That is questionable whether or not this actually works or not.