البـــــوابـــة
The bicycle
The bicycle, bike, or cycle is a pedal-driven human vehicle with two wheels attached to a farme one behind the other.
Bicycles were introduced in the 19th century and now number about one billion worldwideThey are the principal means of transportation in many regions. They also provide a popular form of recreation and have been adapted for such uses as children's toys
The basic shape and configuration of a typical bicycle has changed little since the first chain-driven model was developed around 1885. Many details have been improved, especially since the advent of modern materials and computer-aided design These have allowed for a proliferation of specialized designs for particular types of cycling .
The bicycle, bike, or cycle is a pedal-driven human vehicle with two wheels attached to a farme one behind the other.
Bicycles were introduced in the 19th century and now number about one billion worldwideThey are the principal means of transportation in many regions. They also provide a popular form of recreation and have been adapted for such uses as children's toys
The basic shape and configuration of a typical bicycle has changed little since the first chain-driven model was developed around 1885. Many details have been improved, especially since the advent of modern materials and computer-aided design These have allowed for a proliferation of specialized designs for particular types of cycling .
