I totally agree with the other gals - the frame sizes alone doesn't mean too much. If I plug all of my stats into most manufacturers sizing charts I usually come up with a recommendation of a 46 to a 48, but my current bike is a 44cm and it fits me well - but I am still looking at getting a shorter stem! I am 5' even, with a short arms. Of course with a different company and different geometry the "size" that fits me could change. To make it even more confusing not all manufacturers measure the same. Its better to get out there and find a good fitter and test ride, test ride, test ride. BTW - I understand for a little more moola Litespeed will customize the geometry of any of their frames.

Q. why would the smaller frame be the "relaxed fit" and the larger be the "competitive" fit? logic tells me the smaller frame would allow you to get your seat up higher and your handlebars lower for a more aggresive position? I only ask because I just had my stem flipped to get me down lower and once I get used to the new position the spacers will be moved to the top to lower me even more. I think this new bike is the first one I've had that has been small enough to get the handlebars lower than the saddle (right now with the stem flipped its about level)