Originally Posted by mswantak
Your Mirage has a high-tensile steel frame, 2040 I believe. I wouldn't hang my head over it though -- pay no attention to these CrMo snobs.
No issue of pride here as the frame itself is liable to be replaced in time, but I don't think it's 2040, though still, might not be Chromolly.
Any clues how to find out and if Motobecane ever used mixed grade tubing?