bottom bracket

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bottom bracket

Where it comes from

From earlier bicycle designs, when it was a separate piece bolted onto the bottom of the frame. In modern designs the bottom bracket shell (or housing) is an integral part of the frame.

noun bottom brackets

A bicycle part that connects the crankset (chainset) to the frame and allows the crankset to rotate freely. The chances are excellent that some of the material will fall down the seat tube and get into the bottom bracket, where it will make mincemeat of your crankset bearings (thought seats were simple, hah?).
Similar: BB

Translations

Every language

noun Translations

Español	eje pedalier, pedalier, juego de pedalier
Português	movimento central
Français	axe de pédalier, jeu de pédalier
Deutsch	Tretlager, Innenlager, Tretlagerachse
Italiano	movimento centrale
Русский	велосипе́дная каре́тка velosipédnaja karétka

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MLA

"bottom bracket." Wiktionary, via Micwyn, micwyn.com/word/bottom%20bracket. Accessed 6 Nov. 2026.

APA

bottom bracket. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/bottom%20bracket

Chicago

"bottom bracket." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/bottom%20bracket.

BibTeX

@misc{bottom_bracket_2026,
  title = {bottom bracket},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/bottom%20bracket},
  urldate = {2026-11-06}
}