Bicycles were introduced to Europe in the late 19th century, and by the beginning of the 21st century, more than 1 billion were produced worldwide. This number is much higher than the number of cars, which is aggregated and ranked by the number of individual models produced. They are the principal means of transportation in many areas. They provide fun entertainment and have been customized for use as children’s toys, general fitness, military and police applications, courier services, bicycle racing, and bicycle stunts.

The basic shape and layout of a typical straight or “protective bicycle” have changed, at least since the first channel-based model was developed around 1885. But many details have been improved, especially with the advent of innovative materials and computer-aided design. It has allowed the expansion of special designs for many types of cycling.

Cycle industrial invention has had a huge impact on society in terms of culture and development of modern industrial practices. Many important elements were eventually invented for use in cycles, including bike bearings, pneumatic tires, chain-driven sprockets, and tension-based wheels