Originally Posted by
merlinextraligh
6'1" 34" cycling inseam. I've got a 60cm Paramount, a 59cm Merlin, a M/L Giant which is nominally a 57cm.
They all fit. The point being the nominal measurement of the frame isn't the end of the story, and what you fit on between 2 sizes may vary from frame to frame, depending on geometry, and how that manufacturer measures its frames.
Indeed. I am 6' with a just about a 34" inseam and I am currently riding an older Lemond that was supposedly a 60cm, but measures 58.5 c-c, with the top tube measuring the same. It fits fine (although my stem is a little long) and is quite comfortable. it's probably a touch too large for me so I am now looking for 58cm. It probably won't be the most aggressive of stances (usually attained by a smaller frame), but I don't need to strive for that look, not to mention that my flexibility is merely adequate.
The problem is that every frames seems to be measured differently or the geometry is so different that conventional measurements don't apply correctly.
A 58cm frame with fairly conventional geometry should fit you fine. The 60 might require less bending and be easier on your back and neck. In part the choice depends on what kind of riding you do. Do you just want to go fast, or do you want to go long distances? Speed = smaller frame; Endurance/distance = larger frame (huge generalization, I know).