Originally Posted by
so-so
If i remember correctly, the black frames downtube is altered to look like that, as in the downtube is really the same tubing as the rest of the bike, and the guys just added on to it using something (don't remember) to make it look big and aero.
Not 100% sure on that though, I think I remember hearing it this way but could be wrong.
sounds and looks about right. that's what i was thinking.