Just like riding a bike

The bicycle can be generally defined as a vehicle with two wheels arranged in a line behind the other, set in motion by means of two pedals with foot operated. It is estimated that cycling is three times more energy efficient than walking, and the speed is three - four times higher.
Being invented in 19th century Europe, bicycles are now number over one billion, providing in many areas primary means of transport. They are also very popular as a way of leisure, and have been adapted for use in many other areas of human activity such as that of toys, fitness, military applications, courier services and cycling sports called.
Basic shape and configuration of the frame, wheels, pedals, seat and handlebars have undergone only minor changes in 1885,when it was built the first chain model, although many important details have been improved, especially with the advent of modern materials manufacturing and computer aided design. These special models have allowed the spread of the practice of a particular type of cycling.
Bike considerably influenced history, both cultural as well as in industry. In the early years, bicycle construction drew on existingtechnologies, but lately bike to turn helped to develop the technologies, both in old fields, as well as in new ones.