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A tricycle, often abbreviated to trike,〔The Little Book of Trikes. Adam Quellin. Veloce Publishing Ltd, 1 Dec 2011〕〔The Hanukkah Trike. Michelle Edwards, Kathryn Mitter. Albert Whitman and Company, 1 Sep 2010〕〔Tilting Trike. Popular Science Jul 1980.〕〔Keeping Balance: A Psychologist's Experience of Chronic Illness and Disability. Katherine Cuthbert. Troubador Publishing Ltd, 3 May 2010〕 is a human-powered (or gravity-powered) three-wheeled vehicle. Some tricycles, such as cycle rickshaws (for passenger transport) and freight trikes, are used for commercial purposes, especially in the developing world, particularly Africa and Asia. In the West, adult-sized tricycles are used primarily for recreation, shopping, and exercise. Tricycles are favoured by children and senior adults alike for their apparent stability versus a bicycle, however a conventional trike has poor dynamic lateral stability, and the rider must take care when cornering to avoid tipping the trike over. ==History== A three-wheeled wheelchair was built in 1655 or 1680 by a disabled German man, Stephan Farffler, who wanted to be able to maintain his mobility. Since he was a watch-maker, he was able to create a vehicle that was powered by hand cranks. In 1789, two French inventors developed a three-wheeled vehicle, powered by pedals; They called it the tricycle.〔 In 1818, British inventor Denis Johnson patented his approach to designing tricycles. In 1876, James Starley developed the Coventry Lever Tricycle, which used two small wheels on the right side and a large drive wheel on the left side; power was supplied by hand levers. In 1877, Starley developed a new vehicle he called the Coventry Rotary, which was "one of the first rotary chain drive tricycles." Starley's inventions started a tricycling craze in Britain; by 1879, there were "twenty types of tricycles and multi-wheel cycles ... produced in Coventry, England, and by 1884, there were over 120 different models produced by 20 manufacturers." The first front steering tricycle was manufactured in 1881 by The Leicester Safety Tricycle Company of Leicester, England, which was brought to the market in 1882 costing £18. They also developed a folding tricycle at the same time. Tricycles were used by riders who did not feel comfortable on the high wheelers, such as women who wore long, flowing dresses. In the UK, upright tricycles are sometimes referred to as "barrows". Many trike enthusiasts in the UK belong to the Tricycle Association, formed in 1929. They participate in day rides, tours, and time trials. Massed start racing of upright tricycles is limited to one or two criteriums such as in Bungay, Suffolk, each year. 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「tricycle」の詳細全文を読む スポンサード リンク
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