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um... the tread
A Dragster uses what is referred to as \"racing slicks\". The tire itself has smooth tread. The smooth tread is used to get maximum contact to the road, while also maximizing the traction for any tire dimension.
Traction is the amount of grip that a tire gets on the road.
The tread of a tire or track refers to the rubber on its circumference that makes contact with the road. As tires are used , the tread is worn off , limiting its effectiveness in providing traction. A worn tire tread can often be retreaded. The word tread is often used incorrectly to refer to the pattern of grooves cut into the rubber . Those grooves are correctly called the tread pattern, or simply the pattern .
The tread is what grips the road.
The tire has almost no traction and can blow out at any time. It will also hydroplane in very little water. A tire should be replaced when there is 2/32 tread left. A bald tire is an accident waiting to happen.
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.
The width of the contact patch of the tire on the road.
A non directional tire has a tread design that is the same regardless of mounting direction. A directional tire normally has a v-grooved tread pattern designed to give better traction and handling at high speeds and wet road conditions and are usually used on high performance cars.
The tread mark it leaves on the road.
Friction between the tire rubber and the road give traction.
The tread.