how do tire treads actually generate more traction on flat surfaces?

Question

I can understand in off-roading because they would actually bite into the ground and push against it, but if the road does not deform into the treads then wouldn’t it be better to have them slick for more surface area? why do race cars use slick tires and not consumer vehicles?

In: 186

Answer 1

Because roads are frequently wet and dirty.

Race tracks are clean and smooth. It’s extremely dangerous to drive on slick tires in wet conditions, or if there is sand on the track. The slick tires have better traction on dry pavement, but will hydroplane on wet surfaces.

The treads on a tire help prevent hydroplaning by directing water and sand out from under the contact surface.