Are you sure?
The effective tt increases with each size.
edit!
I re-read your comment. Reach doesn't. Gotcha.
The top tube length is meaningless without the headtube, and seat tube angle, as well as bottom bracket drop, fork length, etc.
edit - you gotcha.
Cannondale recently revamped their SuperSix/CAAD12 sizing to be more consistent in different sizing.
@edscoble started
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Are you sure?
The effective tt increases with each size.
edit!
I re-read your comment. Reach doesn't. Gotcha.