I picked up an '86 Redline, the one with the blue square, yellow triangle and squggly blue line on the decals. The decals are worn, and the one that identifies the model is gone. I bought a set of RL repop decals for it, but they come with decals for every model made in '86, as best I can figure. I think that what I've got is probably a 400c or a 500c. Were those the same frame built with different components? What would the TT measurement be for one of those vs. a 600clx? It's a 4" HT, so it must not be a PL. And what's a ML-20? Assuming it's a lesser frame, do I really have to put that "tri-moly" decal on it

Thanks guys!

i'm pretty sure they were actually stamping "trimoly" on the BB by that time, if it is a trimoly frame. i think the ML-20 was the smaller (microline) size frame.