Originally Posted by oldbobcat .
Right, Davereo, and I just co-opted what you said and related it to information that might be helpful to the original poster. Most inexperienced riders have heard that the top tube is the most important measurement, but they still don't know what size top tube they need. The do go to bike shops, though (sometimes), where a salesman or fitter asks them how tall they are, and says something like, "Let's see how you look on this 52."