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What does BB stand for?

BB stands for Bottom Bracket (bicycle)

This definition appears very frequently

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Other Resources:
We have 199 other meanings of BB in our Acronym Attic

Samples in periodicals archive:

ZAGREB, Croatia, March 6, 2013 /PRNewswire/ -- Bioplanet today introduced Bike, combining several products into one - a uniquely designed bicycle, an e-bike with a bottom bracket integrated electric motor and pedelec as electric bicycle with power assistance - into one lightweight and distinct electric bicycle.
For many years, early childhood educators have advocated for placing a greater emphasis on the infancy and preschool years to maximize the potential of children, knowing that children from families in the bottom fifth of the distribution of income double their chances of remaining in the bottom bracket into adulthood.
For example, the often-made claim that the bottom 20 percent of households has fallen behind those in upper income brackets does not take into account the fact that most of the people in the bottom bracket move into higher brackets over time.