now, I'm 5'7" and use a 54cm c-c top tube on my 52cm orbea road bike, I've tried the 52cm on the redline and it seems to fit fine with me, does this mean I'd probably be getting a size small or medium in the giant? Is the giant compact cross geometry of the same measurements of the giant compact road geometry? I'd try the two sized for myself but I have to make an educated guess because I don't know of any shops around my area that has the cross bikes in stock.