First some background:
I have been watching for a Lemond Zurich for a while. I was pretty much under the assumption that I wanted a 57cm frame, so that is what I have been looking for. I mostly ride a 58x56cm Paramount and a 58x57cm Ironman. Both those bikes fit me pretty well.
So when one showed up for a decent price on CL I went to take a look, although from the pictures I was guessing it was a 55cm. Before I went I found the 2000 Lemond Catalog, and there it lists the 55cm frame as having a 56.5cm top tube, and the 57cm frame as having a 57.5 top tube. This made me wonder if I could really ride a 55cm Lemond Frame.
When I went and looked at the bike it was in great shape (less that 100 miles according to seller), but it was definitively a 55cm. After riding it a bit I decided it was worth a purchase. And after riding it some more this morning I think it feels pretty good. I can't help but notice that it has a pretty tall headset, and the non-stock stem is taller than stock.
So my questions:
If you take all this into account, is there really a substantive difference between 55x56 frame and a 58x56 I normally ride? I really don't see where there would be.
So even though I would not have guessed that I could ride a 55cm bike, my inclination is to keep this bike. But I would probably still keeping a look out for 57cm frame to swap for it. Really not sure why.
Pictures of the bike as I was riding it: I didn't have to change the seat height at all to fit me, but I did turn up the handlebars.