From Wikipedia
Not to be confused with Roadster (bicycle)
A road bicycle is a synonym for the term racing bicycle. It is also used less formally for any bicycle designed for use primarily on paved roads, as opposed to off-road terrain. In general road bicycles have drop handlebars and multiple gears, although there are single and fixed gear varieties.
Racing Bicycle
From Wikipedia
A racing bicycle is a bicycle designed for road cycling according to the rules of the Union Cycliste Internationale (UCI). The UCI rules were altered in 1934 to exclude recumbent bicycles. Racing bicycles are also commonly known as road bicycles.
The most important things about a racing bicycle are its light weight and the aerodynamic efficiency and ergonomics of the rider's position. To this effect racing bicycles may sacrifice comfort for speed. The drop handlebars are positioned lower than the saddle in order to put the rider in a more aerodynamic posture. The front and back wheels are close together so the bicycle has quick handling. The derailleur gear ratios are closely-spaced so that the rider can pedal at his or her optimum cadence.
