The term road bicycle is used to describe bicycles built for traveling at speed on paved roads. Some sources use the term to mean racing bicycle.
Compared to other styles of bicycle, road bicycles share common features:
The tires are narrow, high-pressure (100 psi (700 kPa) or higher), and smooth to decrease rolling resistance
The handlebars are bent ("dropped") to allow the rider position to be leaned forward and downward, which reduces the forward vertical cross sectional area and thus highly reduces the air resistance
They usually use derailleur gears; however, single-speed and fixed-gear varieties exist
They either use disc brakes or rim brakes (although there might be technical differences, for example road bike calliper brakes use shorter and wider pads than mountain bike cantilevers)
