Question for 70s Motobecane Mirage owners
I am looking at a mirage frame locally (I suspect that it is an early 70s) and I am tad confused. From what I have seen in the internets, these were 10 speed rigs with a simplex RD. This frame looks like a track frame (no RD attachment built in) and the spacing is closer to 126 than 120 (with my little pocket measure), which is tres strange for a 5 gear cassette bike. It does not look like a hack job because it is ultra smooth and has the original paint job. I've seen several Mirage frames from that era on line and all look like (well) track frames. Did those bikes use a RD bracket of sorts?