Originally Posted by
Fiery
Those are the measurements for the nominal sizes 54 and 56. It seems to me that you had a mis-marked frame. Top tube of 57.5 cm has meant nominal size 58 for Cannondale for the last decade at least - just check the geometry charts.
Personally, I find the Cannondale geometry charts to be exceptionally clear and informative, but I guess the abundance of information can make them confusing for those who aren't as interested in every little measurement there is.
True, the measured height is what you expect it to be -- i.e., the c-c -- whereas the spec'ed frame size is the same or a bit bigger in recognition of the longer headtube and consequent taller stack height.
From what I see from the specs, CAAD 10, at least in my size, looked to be more in the classic style due to its horizontal top tube and short wheelbase but, for at any given size, it also has a longer headtube than the old classic stealies, which puts it more toward the comfort/endurance geo.
Consequently, if there is a standover issue or for those who may want an shorter headtube because they prefer a more aggressive riding position than the comfort/endurance geo will allow, it looks like you may need to go down a size.