I had a look at the article on levi's "tarmac sl" on cyclingnews and noticed it was the cr1 that saunier duval use.
http://www.cyclingnews.com/road/2006/tour06/tech/?id=/tech/2006/features/tour_bikes13
Pay close attention to the BB and the seatpost/ top tube join.
http://www.cyclingnews.com/road/2006/tour06/tech/?id=/tech/2006/features/tour_bikes13
Pay close attention to the BB and the seatpost/ top tube join.