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The inside diameter and width of the shell are the same as english/bsa threading so you can have the drive side re-tapped to a left hand english/bsa thread.
Some reports seem to suggest the bottom bracket will be a loose fit if you do this and you'll need to use loctite or teflon tape etc but I've actually ran taps the wrong way through a frame before (luckily my own and not a good frame, never put a bike upside down on the bars and saddle to chase bb threads!) and I didn't find the bb was a loose fit.
M_V
Hey,
I'm currently building up an old french frame and looking to install a modern crankset. Is it worth getting the Velo Orange french thread bb or would servicing the old bb and installing a new axel to take the new cranks suffice?
I guess the tradeoff is less maintenance and a longer lifespan vs having to always rely on someone making a new bb with french threading (and as far as I can tell VO is the only one?)
VO also make a (seemingly) decent threadless option, but I might as well just get the correct threading a slightly cheaper price.
Are there any other options i'm missing?
Cheers!
Rory