My current bike is a 53cm frame, but with a 57cm top tube. I'm thinking that, since this is a mid 80's bike with stem shifters and suicide brakes, that it may have been designed to ride the tops comfortably. My question would be, would this sort of stretch make for a reasonable touring bike? I'm finding that I enjoy longer rides, but found my neck and shoulders felt kinda beat after a long ride recently. Could be conditioning, I will grant; and I am starting to redo the fit: but would this bike be more amenable to my wants? For comparasion, I've been wrenching on a 53cm World Sport (top and seat tubes), and it feels twitchy by comparasion, yet the Panasonic is only maybe 2cm longer on the wheelbase.