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Why is carbon black added to rubber tires?

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A color-coded periodic table of the elements displays each element's symbol and atomic number, with categories such as alkali metals, noble gases, halogens, transition metals, and actinoid elements distinguished by different background colors. — carbon group element Modern version of the periodic table of the elements (printable).

Carbon black is added to rubber tires primarily as a reinforcing agent to significantly increase resistance to wear and abrasion, which greatly prolongs the life of the tire.12

As a filler, it is a critical component in tire manufacturing; a standard automobile tire typically contains about one-fourth of its weight in carbon black. In addition to its reinforcing properties, carbon black is used to provide electrical conductivity in specific applications, such as tires for oil trucks or hospital equipment, where the buildup of an electrostatic charge must be avoided.13

While carbon black is a form of carbon, it is distinct from graphite in its structure and properties. Its role in tire compounding is essential for achieving the necessary durability and performance required for modern automotive use.123