what was the reason for the birth of external BBs? i kind of missed the whole revealing and they just seemed to appear on the scene for me...
is it more about weight saving?
to me, if i think about it, the stress is now concentrated on the 2 ends of the BB shell, rather than dissipated throughout the length of the shell and bottom bracket spindle....
i could be wrong, i've literally just spent about 10 seconds thinking about it....
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