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.
NASCAR tires do not have tread because the cars do not drive on a wet surface. Tread helps channel water away from the surface of the point where the rubber meets the road. Since NASCAR does not race in the rain, a smooth tire gives more surface for the tire for the most traction and speed.
They fill their tires with nitrogen.
At the beginning of a race or a restart after a caution, Nascar drivers will weave their cars side to side to clean off as much debris as possible from their tires. Also, this process will heat up the tires for a better grip.
For maximum grip.
NO
Yes the new tires are faster and do not slip.
About 1500 dollars a set.
1995
The biggest tires that are common have about an 29" outer diameter.
Probably sell them as souvenirs.
It is just a form of celebration.