my 70's 80's motobecane super mirage had a SWISS threaded BB so I just swapped out a shimano sealed BB I had from a MTB (110mm)
my BB has "TANGE japan 35XP1" stamped on it.

so I think you need a french bike older than the 70's to have the dreaded french threaded BB (which is like $50 to have re-tapped)

(if anyone wants that original BB PM me)

Assuming you're not going super-bling with this conversion, and assuming the bottom bracket cups aren't destroyed, just leave the fixed cup (the one that's being a pain to remove) in place. Figure out what crank you want to use, and bring everything to a well-stocked bike shop to find a spindle that (a) fits your bottom bracket shell and (b) gives you the right chainline with your crank.

You could try to obtain a modern, sealed bottom bracket, which has the cups, bearings, and spindle all built into a single unit. But because of the threading headaches mentioned in previous posts, I would just work with what you've got, switch up the spindle, and avoid the extra hassle (and potentially very high cost) of replacing the whole thing.

i dont know who you think are ripping you off, but you are much better shopping local here in nyc and talking to a mechanic about what you need and what you are trying to do than guessing about it on milwaukee bikes. go to bike works or trackstar. dura ace cog=$22 & lockring=$10. they can also help your bb issues. or, go to a times-up repair workshop and learn about the parts, tools and how to fix things. you'll be much better off.
...and im sure there are some people riding in queens already...:)

I got a chance today to look at my bb since i work last night the bb was made in japan one cup says siguino and the other says "SAKAE SR-SC 35xP1 Japan" I think pretty much its a french /swiss after reading all these post's i assume so i guess ill look for a spindle and call it a day.



As for shops in queens i've been to busy bee bikes in the LES and some shop in astoria the one in astoria was a bit better though.