Refer to the picture below, the mark of a new tire is a graphic composed of the letters CST.

The earliest tires were made of wood, which can be seen on ancient Chinese chariots and foreign gentleman's carriages.

Later, when the explorer Columbus explored the New World for the second time from 1493 to 1496 and reached the island of Haiti in the West Indies, he was surprised to find a rubber lump that local children played with.

Later he brought this wonderful thing back to his motherland. A few years later, rubber was widely used, and the wheels gradually changed from wood to hard rubber. But at this time, the rubber tires were still solid, which made it uncomfortable to walk on and made a lot of noise.

The first person to buy pneumatic tires was named Luo Li, who was a nobleman. The total price of the four tires was forty-four pounds and two shillings. In 1847, "Scientific America" ??magazine introduced Thomson's pneumatic tire, calling it an epoch-making improvement.