I'm looking at building up my first 'cross bike for general training and with some hopes of trying out some racing this fall. I've been doing a lot of research regarding sizing. One option I am looking at is a used Ridley X-Fire. I found all the articles discussing its odd geometry with the high BB etc. I don't have a road bike currently to compare against but I road a 58cm (58/56cm ST c-t/c-c, 56.3cm TT, 73 deg ST). Seemed to fit pretty good. My latest online fit calculator measurements recommend a 54/56cm c-c/c-t ST with a total reach of 67.2cm, saddle height of 73.45cm.
So I was looking at a 54cm X-Fire and the thing that jumps out is the 87cm stand over height! My inseam is 81.2cm so that seems extremely tall. And that would only give me a 54.5cm TT. Based on the "reach" number above I would need a 130 stem. Most posts here seem to recommend a longer TT/shorter stem setup. I realize that SO height isn't everything, but I wouldn't even be able to straddle the bar.
Am I missing something or misinterpreting the numbers? Or do I just not fit well on Ridley's geometry? Any other general sizing pointers would be welcome too. Thanks in advance!