slick tyres are used.
Street cars air (which is manily Oxygen, nitrogen), race cars nitrogen.
Maxxis makes tires for motorcycles, trucks and passenger cars. They have a high rating from users and supply tires to some race car drivers in England.
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.
Many European cars use 14 inch tires.
It doesn't wet roads take traction away from racing cars. Race cars are fastest with slick tires, when the road is wet it forces them to use threaded tires to dissplace the water. If the racers want to slide easily around corners that the wet road would be helpful
mainly on cars,bikes etc
Starting in 2006, the IRL switched to Ethanol.
Firestone tire is a NASCAR sponsor. Some of the cars use firestone tires other cars use NASCAR tires. Firestone also sells NASCAR tires in addition to their own brand.
GoodYear
Mazda RX-8
My Diamante does
A couple of years ago FIA changed the rule that stated a car can change the pneumathics (tires) when in pit stop during the race. Now they can only use the set of tires that they start the race with.