I think it is Nitrogen. The normal air mixture pumped into regular road cars is not efficient at high speeds and will lose pressure easily. If that happens there could be catastrophic consequence at high speed. That is why they use nitrogen
If you pump nitrogen into the tires of your regular road car, you need not check tire pressure for 3 months.
Nitrogen.
nitrogen
Nitrogen
It's nitrogen.
Nitrogen and oxygen = Air
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I assume you mean tires - not tyers... So some race cars use Nitrogen for the properties that it has. It is noncombustible, has larger molecules and is absolutely dry.
Nitrogen It's volume changes less than air as the tires temperature changes.
Air is used to inflated car tyres but cars can be equipped with nitrogeon inflated tyres but this is usually only beneficial to race cars
Nitrogen.
Nitrogen
Nitrogen
Most pro racing teams are using pure Nitrogen gas in their tires. This has the main advantage of minimising pressure changes as the tire warms up. It will also not feed a fire in a post crash fire.