Why is correct tyre pressure important?

Tyres with the correct pressure can improve our vehicles steering, stopping and grip. Under-inflated tyres can increase stopping distances by up to eight metres, even more so in heavier vehicles and double in bad weather. Under-inflated tyres are not worth potentially hitting something on the road.

Tyre Lebanon is packed full of Palestinian and Syrian refugees living in a handful of shanty town refugee camps.  If we don't maintain pressure on that city and those people, they might pollute the local waters (as they did in 2019) and rebel when arrested and evicted.

Is that the Tyre you were referring to?

This is not a question about Chemistry.  It needs moving to

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#1 ; Too low ; outside of tyres wears too quickly  

#2 ; Too high ; inside of tyres wear too quickly

#3 ; The possibility of 'blow out' a high speed. Very dangerous can loose car control .  

When you drive the rolling friction of the tire on the road causes the tire to heat up and the pressure to go up.  I have had tires explode on a hot day from the increased pressure because I had them over inflated by just 5 psi above what the car manufaturer recommended which was just at the max. recommended pressure by the tire company.

One tire even exploded while NOT driving because the sun beating down on it on a 95 degree day caused the  pressure to get very high.

Similar problems with ow pressure.  Too low and the wheel can pinch the tire, cutting into the sidewall and making the tire burst.  This happened at about 50 - 60 mph on a 2lane road.  I was lucky -- no other cars on the road -- swerved a little but slowed and got control pulled over to the side of the road and changed the flat.  

for your life perhaps?

too low or too high changes the handling and braking ability of the car, which is a safety issue.

that being said, there is a wide range that you can have, as long as you drive carefully. For example, I keep my tires at about 2 PSI over the max for two reasons: better fuel economy, and more margin of safety, since too high is much safer than too low.