Not too busy at work today…
What is the point/benefit of having a top tube that is at a slight angle? There are some bikes that have that angle and some that don’t.
For example, the Cervelo P2K has a top tube parallel to the ground, BUT the Soloist’s and R2.5 Carbon’s top tube in angled.
Why?
As a place to start, take a look at http://www.slowtwitch.com/mainheadings/techctr/compact.html.
On his own website, Cobb has now changed his mind about aero seat posts and feels that they may offer a slight advantage to riders with skinnier legs but not to riders with thick legs.
Seems that there was also something that he felt the sloped top tube might be a detriment from an aero perspective.
Beats me when you consider Luc VanLierde won IM Kona in 1999 with fastest bike leg on a Giant TCR compete with aero aero seat post.
Personally, it seems to me that a lot of this aero stuff is still a big unknown