It helps out the speed and RPM's you run at.
without air the tyres wont go round :/
it doesn't...it makes it less comfortable.Fact
tire rotation
Tires are out of balance. Have the tires balanced.
It is what fills the tires, in the form of air.
With pride, glee, and 10PSI more air in the back tires than in the front. The air part is the most important - because the engine is hanging off the back of the car, control is gained by putting more tire in the back than in the front. You can either put wider tires back there, like Porsche and Lamborghini do, or blow up the tires harder.
Putting helium in your tires can cause them to lose pressure more quickly than if you used regular air. Helium molecules are smaller and can escape through the rubber more easily, leading to more frequent refills.
There are no 'types' of air. Air is all just air. - Some people do use nitrogen in tires - that is not air.
In standard cars is it simply compressed air. The same mixture we breathe.
You're tires weren't balanced properly
pneumatic
oyeah it will