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・ Bottling (concert abuse)
・ Bottling company
・ Bottling line
・ Bottlinger's ring
・ Bottmersdorf
・ Bottmingen
・ Bottmingen Castle
・ Bottnaryd
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・ Bottom
・ Bottom (technical analysis)
・ Bottom (TV series)
・ Bottom 10
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Bottom bracket
・ Bottom breather
・ Bottom crawler
・ Bottom Creek, West Virginia
・ Bottom dealing
・ Bottom Dollar (album)
・ Bottom Dollar Food
・ Bottom eta meson
・ Bottom Feeder
・ Bottom feeder
・ Bottom Feeders (album)
・ Bottom fishing
・ Bottom girl
・ Bottom hole assembly
・ Bottom Line (album)


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Bottom bracket : ウィキペディア英語版
Bottom bracket

The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely. It is not a bracket as such. It contains a spindle that the crankset attaches to, and the bearings that allow the spindle and cranks to rotate. The chainrings and pedals attach to the cranks. The bottom bracket fits inside the bottom bracket shell, which connects the seat tube, down tube and chain stays as part of the bicycle frame.
There is some disagreement as to whether the word ''axle'' or ''spindle'' should be used in particular contexts. The distinction is based on whether the axle/spindle is stationary, as that in a hub, or rotates, as that in a bottom bracket. Sheldon Brown uses ''axle'' once and ''spindle'' four times in his bottom bracket glossary entry. This article uses ''spindle'' throughout for consistency.
An old American term for bottom bracket is ''hanger''. This is usually used in connection with Ashtabula cranks, alternatively termed ''one-piece'' cranks.
==Bottom bracket types==


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「Bottom bracket」の詳細全文を読む



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