Motobecane Grand Jubile for sale
07-09-19, 08:46 PM
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07-10-19, 09:41 AM
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07-10-19, 10:05 PM
#31
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BB is definitely French.
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07-11-19, 06:00 AM
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French bicycles before 1980 often used French-threaded bottom brackets (now difficult to find replacement parts for). French bottom brackets, like Italian ones, used right-hand threading on the fixed cups, making them subject to loosening by precession. Motobécane broke ranks with most other French manufacturers in the mid-70s, using Swiss-threaded bottom brackets (also difficult to find replacement parts for now). Swiss bottom brackets were identical to French, save that the fixed cups were reverse-threaded (like English ones), making them immune to loosening by precession. For more information, see bottom bracket specifications.
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