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Full threaded Stronglight BB: Can someone explain this thing to me?

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Full threaded Stronglight BB: Can someone explain this thing to me?

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Old 09-08-13 | 06:23 PM
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Full threaded Stronglight BB: Can someone explain this thing to me?

Came across this on the 'bay and am confused. What's the advantage? Are the BB threadings that use a R/H thread on the fixed side cut continuously all the way through?



https://www.ebay.com/itm/Stronglight-...item2c725d6e6a
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Old 09-08-13 | 07:49 PM
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Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC

Seen and wondered about that too.
I'd be reluctant to use such if the threads do engage both sets of threads on the BB shell. It just seems like there's more chance of it getting stuck/seizing in the BB shell....
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Old 09-08-13 | 09:24 PM
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I believe the idea is that you can adjust the chainline however you want with this model. Obviously, it would only work for French and Italian threadings, and it would be annoying to thread all the way in.
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Old 09-08-13 | 09:43 PM
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i was guessing that it was like the mavic mobile bb where the threads were only for the lock rings instead of the bottom bracket threads

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Old 09-09-13 | 08:20 AM
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Originally Posted by mapleleafs-13
i was guessing that it was like the mavic mobile bb where the threads were only for the lock rings instead of the bottom bracket threads
I thought about that too. The Mavic has has a bevel on the lock rings to keep centered in the BB, the Stronglight doesn't seem to have any way staying centered and being disengaged from the thread.

All of a sudden the BBs with a R/H threaded fixed cup make some sense: one tapping operation for the BB, with a guaranteed alignment between cups.
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Old 09-09-13 | 08:40 AM
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Curiously, my Stronglight catalog (pg 7) shows this cartridge as being supplied in French, English, and Italian thread:

https://www.os2.dhs.org/~john/catalogs/stronglight.pdf

And FWIW, I have a similar Pino Moroni cartridge BB that is RH English thread all the way across:



Needless to say, I've yet to find a frame that works with it...
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Old 09-09-13 | 08:51 AM
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Is it possible that the threading reflects a manufacturing process rather than a purpose? In other words, the most cost-effective way to produce these models was to chop one long threaded tube into multiple cartridges?
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Old 09-09-13 | 12:49 PM
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Originally Posted by JohnDThompson
Curiously, my Stronglight catalog (pg 7) shows this cartridge as being supplied in French, English, and Italian thread:

https://www.os2.dhs.org/~john/catalogs/stronglight.pdf


That catalog... Wow! I've got a burgeoning Stronglight fetish and that's just what I need to see. Page 12 shows a tool for easier (but still PITA it would seem) installation of that BB.

Any idea the vintage of that catalog?
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Old 09-09-13 | 01:49 PM
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Originally Posted by Don Marco
That catalog... Wow! I've got a burgeoning Stronglight fetish and that's just what I need to see. Page 12 shows a tool for easier (but still PITA it would seem) installation of that BB.

Any idea the vintage of that catalog?
About 1982, as I recall...
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