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Small wheel bicycles are adult bicycles which have wheels of 20 inch nominal diameter or less, which is smaller than the 26", 27.5", 29" or 700c sizes common on most full-sized adult bikes. While many folding bicycles are small wheel bicycles, not all small wheel bicycles can fold. Some small wheel bicycles neither fold nor separate, such as the Moulton, which comes in both fixed frame and separable frame versions. While BMX bikes also have 20" wheels, they are not normally categorised as 'small wheel bikes'. For general information on small wheel folding bikes, please refer to the Folding bicycle and Portable bicycle articles. For specific manufacturers, follow the ''categories'' links. ==History== An early proponent of small-wheeled adult bicycles was Paul De Vivie, better known by his pen name "Velocio". His approach was to use a balloon-width tire of about 2.25" (57mm) on a 20" (500mm) rim, giving a wheel of approximately 24" (600mm) in diameter.〔De Vivie, P. (writing as 'Vélocio'), Le Cycliste, France, 1911. (French original provided by Raymond Henry. English translation commissioned by Tony Hadland.)〕 The man credited with being the father of modern small-wheel bicycles is Alex Moulton who pioneered the field with his F-framed Moulton Bicycle in 1962. His original small-wheeled design notably featured full suspension. Raleigh introduced the RSW-16 as a direct competitor, but it lacked the suspension of the Moulton, and compensated for this by using very wide 2-inch "balloon" tires. The RSW-16 "Compact" was a folding version. In 1968 Raleigh introduced the Raleigh Twenty which later went on to become one of Raleigh's biggest sellers. A large number of European manufacturers made U-frame small-wheeled and folding bicycles in the 1970s. 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「Small wheel bicycle」の詳細全文を読む スポンサード リンク
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