Cannondale front Derailleur clamp size

Does anyone here know what size front derailleur clamp I need for a size 52cm Cannondale CAAD8 frame?

Thanks!

Bump
.

I think 31.8? Its bigger than a CAAD 7, even thought the seatpost clamp is the same size as a CAAD 7.

Styrrell

Straight from the horse’s mouth: The CAAD8 actually uses a 34.9mm clamp front derailleur.

-Pete