Are you wanting to refill air into your tires, but you have no idea what tire pressure you should use for your vehicle?
That’s a pretty common question and the answer for this question can be both advanced and simple.
In this guide, you will learn both the simple and the advanced way to figure out the tire pressure for your tires.
How to find the right tire pressure for your car?
The easiest way to find the right tire pressure you should have is to check in your service owner’s manual. Inside the service manual book, there is often information of where to find the tire pressure label. The most common place is on the chassis, behind the driver door and sometimes at the location of the spare tire. It will look something like this:
You may be looking at that label and not understand anything at all, but don’t worry I will explain it all to you. The first thing you have to check is what size tires you have. Because on most labels, there are many different tire sizes. You will find something like 195/65 – 16; that’s the size of your tire.
What does cold tire inflation pressure mean?
There is information on the cold tire inflation pressure because that is the pressure you should have when the tires are cold. But why does it matter? You may ask. Checking the air pressure when the tire is cold vs warm could make a big difference.
Cold tire – Lower Pressure
Hot tire – Higher pressure
How much the difference is depends on the tire size etc, but the difference could be around 0.4 bar ( 6 psi ~ ).
How can I check the tire pressure myself?
You can either check your pressure with a tool at home or drive to a shop that will check it for you. If you want to check it yourself, sometimes you can use a tool like one in our article Best Tire Pressure Gauge. It’s not expensive at all and can be really good to check your tire pressure with periodically to make sure that you are not driving around with pressure that is too low.
If you want to fill your tire, you should use compressed air. You can find this at a workshop or probably at your local gas station.
My label has different tire pressure depending on how many passengers and the load
Yes, most labels have different pressures depending on how much load you are going to have in the vehicle.
High load/weight – Higher Pressure
Low load/weight – Lower pressure
What’s better? Over or under the recommended pressure?
I always recommend driving a bit over the recommended pressure. In older tires, the middle of the tire thread could wear out if you were driving with too much pressure, but with newer tires, I don’t see that happen if you don’t drive with an extremely high pressure. Around 0.1-0.3 bar ( 1-4 psi ) over is no problem.
In fact, I have seen in several newer vehicles with a tire pressure warning that if you read for an example 2.5 bar ( 36 psi ) and you try that, it will still give you a warning message because the tire pressure should be OVER that value. So what will happen if you fill it with 2.6 bar ( 38 psi ) when the tire is warm? Yes, the warning light will come back when the tires are cold.
So in general, always add 0.1-0.2 ( 1-3 psi) more pressure than the label is telling you.
I use aftermarket rims & tires. How much pressure should I have?
Either you can ask at the place that sold the tires or you can check this list for a general tire pressure chart. I don’t recommend it; your car can wear out the tires faster and you can have less control over the car. But it is a good benchmark to know roughly what tire pressure you should have. Remember what I told you before; it’s often better to have a bit more pressure than having pressure that is too low.
- Small Sized car normal tire size ( around 185/55 – 15 ) ~ 2.1 bar ( 30 psi)
- Medium Sized Car normal tire size ( around 195/55 – 16 ) ~ 2.5 bar ( 36 psi)
- Large Sized car normal tire size ( around 265/45 – 18 ) 2.9 bar ( 42 psi )
In general, if you have bigger rims with a lesser tire profile you should use higher pressure.
Some additional information
You should never drive around with pressure that is too low; you will damage your tire and probably the rim. Your car will also require more fuel because it won’t roll as easily as with the right pressure. It’s also dangerous because you will have a lot less control of the car at higher speeds. It’s always better to have slightly higher pressure. Lesser pressure can be good if you are looking for more grip at lower speeds.
I hope you enjoyed this short guide. If you have any more questions that didn’t get answered, you can contact us.
Let me know if you like this guide by leaving a comment below. If you want us to add or change anything, let us know! See you in the next article!
If you want to watch a video in addition to this article, then I can recommend the video below:
Hi, I’m Magnus, the owner and the writer of this website. I have been working with cars for 10 years, specialized in diagnostics and troubleshooting. On this blog, I’m sharing my knowledge and everything I know about cars. I hope you enjoy it!