Originally Posted by Last ride 76

I'm sorry, are you claiming IDENTICAL test conditions except for frame a that weighs 1 1/2 lbs more & built of different shaped tubes, with a wheelset that is heavier by a lb, and less aerodynamically efficient? And you attribute the 1.1 mph increase to different power transmission characteristics of the frames? Or are you saying that aerodynamic improvement in the frame alone, (not in your position on the bike) accounts for the difference? If you changed your position, absolutely, sure (LeMond/Fignon). Just the frame's power transmission and it's incremental aero improvement? Seems like there's a piece missing.