Road cycling is the most widespread sort of cycling. It includes recreational, racing, and utility cycling. Road cyclists are generally expected to obey equivalent rules and laws as other vehicle drivers or riders and should even be vehicular cyclists.
Dedicated road bicycles have drop handlebars and multiple gears, although there are single and glued gear varieties. Road bikes also use narrow, high-pressure tires to decrease rolling resistance, and have a tendency to be somewhat lighter than other sorts of bicycles. The drop handlebars are often positioned less than the saddle so as to place the rider during a more aerodynamic position. In an attempt to become more aerodynamic, some riders have begun using aero bars. Who and when aero bars, where invented, is unclear but they appear so far back to the first 1980s. The lightweight and aerodynamics of a road bike allow this sort of bicycle to be the second most effective self-powered means of transportation, behind only recumbent bicycles thanks to the latter’s higher aerodynamic efficiency.