Originally Posted by
BCSC
I'm 5'10" and have long ridden a 56 with no problems. But I'm in the market for a new bike and based on my research and several test rides, a 54 (at least with most makes) is a more "ideal" fit for me.
That may well be the case depending on what your idea of an "ideal" fit is. I'm guessing you simply prefer a lower stack height and shorter wheelbase. Because that's what it comes down to when you can fit on more than 1 frame size using different stems and spacers.
I'm just a fraction over 6' and can comfortably fit on a 56 or 58 in most road frames. But my "ideal" fit is usually on a 58 simply because I'm going for an endurance fit with slightly higher stack and longer wheelbase. There is no right or wrong answer to sizing up or down. Only personal preference and riding goals.