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Safety bicycle
A safety bicycle is a type of bicycle that became very popular beginning in the late 1880s as an alternative to the penny-farthing or ordinary and is now the most common type of bicycle. Early bicycles of this style were known as safety bicycles because they were noted for, and marketed as, being safer than the high wheelers they were replacing.〔 Even though modern bicycles use a similar design, the term is rarely used today, and may be considered obsolete.〔
==Definition==
The term safety bicycle was used in the 1880s for any alternative to the penny-farthing. The front and rear wheel were not necessarily the same size. Later historians began to use the term in a more restricted way, for the design that was a direct ancestor to most modern bicycles.〔
"Diamond frame" is also sometimes used as a term for safety bicycles, even though this technically only refers to a certain type of safety bicycle. The retronym "upright bicycle" is used to distinguish the style from recumbent bicycles.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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