the bike doesn't really feel like a big mismatch. I'm not a tall guy. I'm 5'8" with a 30.5" inseam. I measured myself before I set out to look for a frame, and based on my measurements it was either a 51 cm frame or a 53. Since I'd read time and time again that one should have at least 1" of clearance over the TT, I ended up picking the 51 cm frame, which had (according to the charts) a 29.5" height... exactly 1" below my inseam.