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15,000 BC - the prototype of the wheel - log-rollers 4500 BC - wooden wheel with axle 2000 BC - spokes and hub 1000 BC - iron rim 1846 - pneumatic tires 1905 - protector, iron bearing and disk :::: - future - ::::
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wheel
2000 BC - spokes and hub
4500 BC - wooden wheel with axle

Around 2000 BC The Egyptians created the first spoke wheel, thereby increasing the speed and maneuverability of their chariots. Their wheels had 4 spokes, unlike the Greek and Roman wheels, which had 8 spokes each. The larger the diameter of the wheel, the more spokes it needed. The decisive role in the evolution of the wheel with the spokes played the chariot race, where each participant tried to increase the speed of his cart by all means.

And on the peninsula of Asia Minor in the 20th century BC. the first wheel with a hub was invented. Today, this peninsula belongs to Turkey. Soon this invention reached the borders of China, Europe and India.

The invention of the wheel with the hub, which mounted on a fixed axis, was a huge achievement of mankind. The wheels herewith rotated independently of each other. To reduce wheel friction on the axle, it was greased with tar or grease. This greatly facilitated the life of horses loaded with carts and increased their speed of movement.

No less important is the improvement of the construction of the hub, which appeared around the X century. BC, became the first wooden ball bearings, which were a kind of "wheel in wheel" and significantly reduced the friction force in the hub at high speeds.

Information sources and literature:

  1. http://tut-cikavo.com Історія винаходу колеса. 2019-05-20.
  2. https://cikavi-fakty.com.ua Історія винаходу колеса, хто за цим стоїть? 2019-05-21.
  3. https://www.historyanswers.co.uk Evolution of the wheel. 2019-05-22.