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A utility bicycle is a bicycle designed for practical transportation, as opposed to bicycles which are primarily designed for recreation and competition, such as touring bicycles, racing bicycles, and mountain bicycles. The vast majority of bicycles that can be found in the developing world〔 〕 are utility bicycles. As such, utility bicycles are the most common form of bicycle globally. ==History== Bicycles have been promoted for their utilitarian strengths since before they were technically known as bicycles. The draisine and the boneshaker were hoped to become an inexpensive utilitarian alternative to horses by their makers.〔 〕 However the inherent danger, cost, discomfort, and restrictive gender roles of the day, kept it popular mainly with wealthy adventurous young men, and mainly for recreation and sport. The development of penny-farthing moved away from the utilitarian goal of earlier forms, with its less stable ride, and difficulty carrying much baggage. It furthered the trend of bicycles to be used by young men, willing to take risks, for sport and recreation. Despite this, we find the earliest mention of working bikes in 1874, in Paris, as couriers, for a newspaper and the stock market riding penny-farthings.〔 〕 It was the introduction of the safety bicycle that was successful for the first time to build a bicycle that worked well for utilitarian purposes, "a poor man's nag".〔 〕 It was this development that was the cause of the bicycle boom of the 1890s. The main use of bicycles during the boom was still sport and recreation, but additionally they were adopted by many professions: police, postal workers, delivery men, municipal workers and for basic transportation of people of all classes, races, and genders.〔 〕 In the USA, after the boom, use changed dramatically from sport and recreation to basic transportation. By 1902, as the boom was coming to an end, nearly all cyclists were cycling for practical purposes.〔 〕 The price of bicycles dropped dramatically, due to increased competition between makers and more price conscious consumers; profits dried up and many of the cycling manufactures went out of business. The history is similar in the UK, but there some of the manufactures were better able to handle the transition to transportation based cycling, even to the point of talking of a second boom due to so many working-class people taking up cycling.〔 〕 Additionally the British makers were able to tap into the developing markets overseas, primarily India, China, and Japan. In countries like the USA, the use of utility bicycles all but disappeared until after the Second World War, when a few British and Italian roadster-type bicycles saw a brief upsurge in popularity. Since the Second World War, utility bicycles have remained popular in countries like the Netherlands, China, and much of the developing world. 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「utility bicycle」の詳細全文を読む スポンサード リンク
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