Car tires are world famous for being black, so many people think that black is their original or natural color.  In fact, the color of the factory rubber mixed with the solver is yellowish gray.  And if you look at pictures of old cars, you will see that the color of their tires is much lighter than that of modern tires.  The rubber component of modern tires is a complex chemical substance that sometimes contains more than twenty balanced components.  However, the most important element is carbon black.  The addition of carbon to the frame mixture allows the designer to modify its performance characteristics after its completion. 

In general, the tires used for daily use contain a small amount of carbon black, while the percentage is higher in the tires for racing cars. 

The higher the quality and quantity of carbon in the tire mixture, the greater the area of the outer surface of the car tire, which ensures the passage of heat from the car to the tire, which will rapidly increase in temperature.  All of this is suitable for the characteristics required in the tires prepared for racing cars, as the efficiency of the tire increases as its softness and softness increase at the peak of the race. As for the tires used for regular cars, the issue of reducing the friction of the tire with the ground is adopted (to reduce fuel consumption), in addition to studying the wheel comprehensively to increase The duration of its use in the car.  In the end, we see that choosing the appropriate wheel depends on the purpose of use. The frame of a racing car is different even from the frame of a cargo vehicle or a touring car