I recently acquired an older blue Motobecane Mirage with a great frame and paint. I have stripped it all down and salvaged everything I can (frame, front wheel, handlebars, front brake) but now I'm left with a quandary.

What type of bottom bracket/crankset/rear wheel will I need?

There is something bizarre about the bike so I've read but I can't find a solid answer.

  • 2
    Can you be a bit more clear about what you mean by "something bizarre"? And are you wanting to build it up with gears, single-speed, or fixed?
    – jimchristie
    Commented Sep 25, 2013 at 2:35
  • 3
    Take it to a bike shop. Fixing bike problems over the internet is hard enough, and this question is way too sparse on details.
    – joelmdev
    Commented Sep 25, 2013 at 4:05
  • 1
    What exactly are you converting? What do you mean by 'older'?
    – WTHarper
    Commented Sep 25, 2013 at 5:11
  • @WTHarper I could imagine he means that it's a French motobecane rather than the new US brand which are produced in Taiwan
    – dieKleene
    Commented Sep 25, 2013 at 21:30
  • Is the issue the French bottom bracket?
    – mikes
    Commented Sep 25, 2013 at 22:02

1 Answer 1


Having converted two 70-something Motobecans, take to your best local shop to figure out what fits your bottom bracket.

As Mikes asked Is the issue the French bottom bracket? Or reverse threads?

As a last resort, Velo Orange has a bracket that will work. DO get rid go the cottered cranks!

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.