Originally Posted by
CrimsonKarter21
The Six13 is no better than the CAAD9, and has a taller headtube for pansies. The SystemSick would be raw like fresh beef, and you can buy clothes........... eventually.
While I haven't looked at the 08 specs.. The 2006 six13 has virtually the same head tube length as the 07 system six/CAAD9.. I have both an 06 six13 and 07 system six. The geometries are very identical. The six13 has shorter chain stays.
It's my opinion that you can't go wrong with any of these bikes.
--jim