Tires serve many functions. Many, they protect the wheel from wear, increase a vehicle's ability to grip the road, and provide some shock absorbtion.

Tires are most popularly used for automobiles and are usually made from a combination of synthetic rubber and steel. Steel is used inside the tire to ensure the outer surface is flat with the road and doesn't just wear in the center of the tread. Car tires also are inflated to retain the shape of the tire and contain a harder outer suface with treads to grip the road and protect the tire from being damaged.

The tread and material used in car tires vary greatly depending on use. The largest variation in material is hardness. A soft tire grips pavement the best, however it also wears the fastest so most tires lie somewhere in between. The treads on tires mostly vary in size. Very large treads work the best on loose surfaces such as mud and rocks. Tires with smaller treads are used for normal driving and tires on ideal surfaces, such as racecar tires have no treads at all.

Avon

BF Goodrich

Bridgestone

Continental

Cooper

Dunlop

Falken

Firestone

Goodyear

Hankook

Hercules

Interco

ITP

Kelly

Kumho

Mastercraft

Maxxis

Michelin

Nitto

Pirelli

Sumitomo

Toyo

Uniroyal

Yokohama

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