02-26-2005, 08:37 PM
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#4 (permalink)
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| Guest | Re: Motobecane project of mine.
James Thomson wrote:
> "b_baka" <bbaka@syix.com> wrote:
>
>
>>Schwinn Super Sport [pedal] 'looks' like the correct thread
>>but will only just engage and then binds. Does anybody know
>>what a 1950-1960s Motobecane would be likely to use?
>
>
> A French bike of that era will have metric pedal threads - 14mm x 1.25mm.
> That's close, but not close enough, to the modern 9/16" x 20tpi standard,
> as you found out.
>
> Your best bet is probably to replace the left crank with a non-French one.
I did that on the right side since I had a Schwinn with a bigger set of
gears that had the pin lock mount style. The original crankset was too
small so it was not a loss there. Unfortunately I have the bad habit of
only keeping the right crank with the gears and not the left, which
today proved, will be needed when you least expect it.
> Alternatively, you might be able to have the crank rethreaded.
>
> Sheldon Brown has a useful page on older French bicycles that lists some of
> the other incompatibilities you might encounter:
>
> http://www.sheldonbrown.com/velos.html
>
> James Thomson
>
>
Thanks,
I always seem to be getting sent back to Sheldon Brown.
The bike does ride OK for an antique so now I am in a bit of a hurry to
get that last part done, with only the shifters to go, so single speed
for a while.
Going there now.
Bill Baka
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