Originally Posted by
cyclotoine
I've got an early 70s super course frame in the garage with a 65cm ST and 56cm TT. HA! yeah some manufactures did some funky stuff. some people like more upright positions though so big frame with short top tube can sometimes be desirable.
I don't think that it has to do with uprightness... Some of us like aggressive geometries, supplemented with really long stems and tall seat tubes as racing machines. Find me a 51-2 cm CC with a 46-47 cm TT (same relative proportions you mentioned above; about a 75-76 degree SA) made from appropriate steel, and I'd get it off your hand in a moment's notice, no questions asked
I've seen that kind of geometry in big frames, just wish I could shrink them about 5 sizes (and make them what I like - just about 2 sizes too small for me)...