my *guess* is caad6. I believe that typically you don't get the "most current" caad in a given year until r1000 or above. I know the 2004 is a caad7 optimo (I ride one). that is why my guess is caad6. But I'm suspicious because I have only seen the word optimo on caad7 previously. I may also have no clue what I'm talking about...and am too lazy to check cannondale's tech site to confirm
my *guess* is caad6. I believe that typically you don't get the "most current" caad in a given year until r1000 or above. I know the 2004 is a caad7 optimo (I ride one). that is why my guess is caad6.