I'm converting a Motobecane Super Mirage for my son; he wants to ride fixed with me, which I think is uber cool. And at 17 there's not much he wants to do with dad anymore so I'm jumping on it.
I have a number of frames but this Motobecane seems to be his size. Further, its rear spacing matches the rear spacing of the Kilo TT stock wheels (110 or 120 or something like that) which I also already have. With a bit of bottom bracket fiddling it looks like it'll have a pretty right-on chainline, and he'll be running 42/16 on 170mm Sugino cranks (to be replaced with 165s as soon as I get some to make up for the 27"/700c wheel issues.)
Anyway, my question is with the mixte type frame. I'm sure C&V might be able to answer this better, but if I mentioned converting it they'd probably go all wonky on me. What was their purpose? Mixtes were unisex, right? They weren't, like, "girls bikes" or anything, were they? Did the "top tube" design make for a stronger frame or something?
Any info y'all got would be great. Thanks!