This is called the tread. It must be durable and heat resistant, and its grooves help keep it in contact with the road, especially when it is raining.
The tread is what grips the road.
yes it will because the more tire touching the road the more grip but u cant deflate it to much
B/c when you brake, the tire will have to push against the road surface, when you accelerate, the tire will have to push against the road surface, when you corner, the tire has to push against the road surface. And every time the tire is forced agaist the road surface, a tiny, tiny bit of it is ripped loose, and eventually the tire wears out.
When a tire is properly inflated it will be level to the ground. Over inflated and the middle of the tire has the most pressure on the ground. Under inflated and the sides of the tire have the most pressure on the ground.
They damage the road surface.
high
It helps to cushion the rider against the uneven road surface !
Friction between the tire and the road surface
A tire with a tread has less contact with the road surface than one with no tread. When racing you want to maintain as must tire surface in contact with the racing surface as possible.
Yes. if it wasn't the tire would slip, both against the rim and the road surface.
by improving tire traction for one
The tread is designed to pull through the snow and the rubber is softer so that it can conform to the surface of the road.