Did you know that more than a billion bicycles have been produced worldwide, twice the number of cars produced? Bicycles are eco-friendly and provide great exercise and great transportation.
The basic shape and configuration of a typical upright bicycle or safety bicycle has changed little since the first chain-driven model was developed around 1885. But 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 many types of cycling.