tire tread is for better traction on slippery surfaces smooth tires are for racing at hi speed
If you want traction you need the tread. Smooth tires are only used for racing.
nitrogen
Nitrogen
It's nitrogen.
usually, racing slicks made by Goodyear or Firestone, if its a wet track rain tires.
There are different types of tires depending on what kind of racing they're doing. But pretty much all racing tires tries to be grippier than regular tires. This usually means that they wear out faster, and create more road noise than regular tires, which no one really cares about if can win them the race.
Nitrogen It's volume changes less than air as the tires temperature changes.
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
Treadless racing tires called are slicks.
The more rubber on the ground = more traction or grip for the cars e.g. more speed.
My Tyres is an British company that specializes in tires. Their catalog ranges from the different seasonal tires for the family cars up to racing, truck, motorbike and off road tires. Rims and other car parts are sold as well.