Originally Posted by
Timtruro
I don't believe there is only one correct or comfortable fits, regardless of geometry etc. you can over-engineer this like anything else.
According to a book I have there are three ways to size a bike frame. This was written before the era of sloping TT's. They are: Traditional, "Eddie" (for Eddie Mercyx) and French fit. I won't go into all the details but the Traditional is a racing fit and yields a smaller frame. The French fit yields the biggest and the Eddie is in between.