"The seat tube shaping has been dramatically changed as well, with its more angular shape terminating in a curious tailcone that Cannondale will invariably claim reduces drag once more official information is released. Up top is a new "Naero-Tec Post" that is indeed very narrow but also very shallow from front to back – likely to comply with the UCI's 3:1 maximum allowable cross-section depth."
"The seat tube shaping has been dramatically changed as well, with its more angular shape terminating in a curious tailcone that Cannondale will invariably claim reduces drag once more official information is released. Up top is a new "Naero-Tec Post" that is indeed very narrow but also very shallow from front to back – likely to comply with the UCI's 3:1 maximum allowable cross-section depth."