Bicycles were first developed in 1817 and have long since been used as a form of transport. Originally, the front wheel was much larger than the rear wheel, and the rider was elevated a great deal, making them difficult to control and very dangerous. In 1885, J.K. Starley of England devised the more modern bike with a chain and gearing to allow the wheels to be of equal size. The new bikes stimulated the growth of bicycle racing as a sport.
Cycling at the Olympics features four exciting disciplines: road, track, mountain biking and bmx.