Tires are the car’s only point of contact with the ground. Even so, many basic questions are left for later — until a scare happens.
This FAQ brings together straightforward answers for beginners about tire inflation, wear, and replacement, with practical guidance to reduce risks in daily use.
How often should I check tire pressure?
Ideally, you should check tire pressure at least every 15 days and always before trips. Tires naturally lose pressure over time, even without punctures.
Important points: - Inflate with the tires cold (the car parked for a few hours). - Use the pressure indicated by the vehicle manufacturer, not the one on the tire sidewall. - Don’t forget the spare tire, which is often neglected.
What is the correct pressure for my car?
The correct pressure varies depending on the vehicle and the load. This information is usually found: - On the driver’s door pillar; - On the fuel filler door; - In the owner’s manual.
Can I use the same pressure for all tires?
In most passenger cars, yes. But some models specify different pressures for the front and rear axles, especially when the car is loaded.
Is it dangerous to drive with underinflated or overinflated tires?
Yes. Both situations affect safety: - **Underinflated tire** increases the risk of hydroplaning, heats up more, and wears the sidewalls. - **Overinflated tire** reduces the contact area with the road, worsens braking, and wears the center of the tread.
In addition, both compromise stability and steering response.
How can I identify excessive tire wear?
There are simple signs that any beginner can observe: - Shallow or almost nonexistent grooves; - Uneven wear (more on one side than the other); - Cracks, bubbles, or visible deformations.
What is the tread wear indicator (TWI)?
It is a small raised bar of rubber inside the groove. When the tread reaches the same level as the TWI, the tire has already lost its adequate ability to channel water and should be replaced.
When is the right time to replace tires?
Replacement is recommended when: - Wear reaches the TWI; - There is structural damage (bulges, deep cuts); - The tire shows visible aging, even with little use.
In terms of safety, it’s not worth “stretching” their use beyond these limits, especially on wet roads.
Can I replace just one tire or do I need to replace the pair?
To maintain vehicle balance, the safest option is to replace at least the pair on the same axle. Tires with very different grip levels can affect stability in corners and braking.
Do balancing and alignment affect wear?
Yes, significantly. When they are out of spec: - The car may pull to one side; - The steering wheel may vibrate; - Tires wear unevenly.
Whenever you replace tires or notice these symptoms, it’s worth checking alignment and balancing as part of basic safety care.
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