What Does Tire Pressure Mean?

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If you’ve ever experienced a flat tire, you may have noticed that it isn’t always totally empty of air. What has happened is the compressed air inside has leaked out so much that the weight of the car cannot be supported anymore. Tire pressure is the atmospheric pressure inside the tire, usually rated in pounds per square inch (psi) or kilopascals (kPa).

What is the purpose of tire pressure?

The air inside your tires serves many purposes:

  • It provides cushioning for a comfortable ride. An over-inflated tire rides much harder than one that is properly inflated, while under-inflated tires can cause the sensation of floating.

  • It enables easier rolling resistance and less road friction. The result is better fuel economy and less heat generated by the tires.

  • It prevents unnecessary or uneven tire wear. Excessive friction from under-inflated tires causes heat, which accelerates tread wear and wears out the outer edges of the tires. Over-inflated tires wear the center part of your tire, and can affect the steering feel of the vehicle.

How to determine the correct pressure for your tires

The optimal tire pressure for your vehicle is written on a placard located in the driver’s door jamb in nearly all cases. Some placards are in the glove box or on the edge of the door itself. The tire pressure rating on the placard should be adhered to.

Note: There is a maximum tire pressure embossed on the tire itself which should NOT be used. It is there to indicate the maximum safe pressure of the tire itself, but can and will cause undesirable driving feel and excessive tire wear.


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Michael

15 years of experience
518 reviews
Michael
15 years of experience
Mercedes-Benz GL450 - Brake Pads Replacement (Rear) - Atlanta, Georgia
Micheal was punctual and friendly. Work was completed within promised time. Will definitely use again.
Volvo S80 - Brake Pads Replacement (Front) - Roswell, Georgia
Michael was SUPER QUICK with doing my brake and rotors. Great communication throughout the whole process. Will always recommend

Kenneth

19 years of experience
509 reviews
Kenneth
19 years of experience
Toyota Sequoia - Brake Pads Replacement (Front) - Newport Beach, California
Kenneth did a great job and very knowledgeable. He has a great attitude and I will for sure be using him again.

Chuy

13 years of experience
129 reviews
Chuy
13 years of experience
Honda Civic - Brake Pads Replacement (Front, Rear) - Cicero, Illinois
Excellent work on doing the breaks for my car and the break and steering system flush I’ll definitely recommend and take into consideration for chuy’s work whenever I need a fix on my car

Richard

16 years of experience
72 reviews
Richard
16 years of experience
BMW 328i - Brake Pads Replacement (Rear) - Dublin, California
Richard was an outstanding mechanic. After he arrived, the first thing he did after taking the initial pictures of the car is an assessment into what work was asked. He quickly verified that I did not need brake fluid and my front brakes even-though it affects his personal commitments and time, which I think is highly appreciate and thorough professional. He was detailed oriented - took time to make sure that all the issue are fixed. He paid attention to detail in overall car assessment- he goes above and beyond. He was also teaching me through the process which I found highly educational and appreciate him providing the information ensuring and making me comfortable what he was doing and explaining patiently all the questions that was thrown at him. When he works - you know he's highly skilled and experienced and knows his stuff. He is highly experienced. He is a "Master" mechanic in true sense :)

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