Hello! Jfyi, I was not allowed to use the word “tire” in the title so I had to improvise.

For example, a specific car must have(acording manual) 2.3 bars in all wheels. Is driving with 2.0-2.1 bars that bad? And when it’s the best way to measure it, with cold tires or after a drive?

I argue with one of my family member all the time regarding tire pressure. He is maniacal about it(like checking every 2-3 days) and I am curious how bad it is(if it is).

Thx