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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. Other sources specifically exclude racing bicycles from the definition, using the term to mean a bicycle of a similar style but built more for endurance and less the fast bursts of speed desired in a racing bicycle; as such, they usually have more gear combinations and fewer hi-tech racing features. Certain of these bicycles have been referred to as 'sportive' bicycles to distinguish them from racing bicycles. Compared to other styles of bicycle, road bicycles share common features: * The tires are narrow, high-pressure (>=100 psi), and smooth to decrease rolling resistance. * They usually use derailleur gears; however, single-speed and fixed-gear varieties exist. * The bicycle is of a lightweight construction. The term ''road bicycle'' can also describe any type of bike used primarily on paved roads, in contrast to bikes primarily intended for off-road use, such as mountain bikes. Several variations of road bikes include: * Touring bicycles are designed for bicycle touring: they are robust, comfortable, and capable of carrying heavy loads. * Hybrid bicycles are designed for a variety of recreational and utility purposes. While primarily intended for use on pavement, they may also be used on relatively smooth unpaved paths or trails. * Utility bicycles are designed for utility cycling: are a traditional bicycle for commuting, shopping and running errands in towns and cities. * * Roadster a specific form of the utility bicycle developed in the UK. * Recumbent bicycles are designed for variety of recreational and utility purposes, but are characterised by the reclined riding position in which the cyclist is seated. * Vintage road bicycles, also known as classic lightweight bicycles, are generally older bicycles with frames which are manufactured using steel tubing and lugs. Certain examples of this bicycle type have become collectors' items, with potential values of several thousand dollars. Other cyclists prefer this type of bicycle to those manufactured using modern techniques because they are "practical, versatile, durable, repairable, and timeless, regardless of current popular trends." * A flat bar road bike, also called a fitness bike is a relatively new style of bicycle. It is simply a road bike fitted with MTB-style shifters, brake levers and a flat handlebar. This combination provides a light, fast bike with a more upright and neutral riding position. A flat bar road bike is most commonly used for commuting, urban and fitness riding. == See also == * List of cycling topics 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Road bicycle」の詳細全文を読む スポンサード リンク
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