This is a test that we did comparing Tarmac, Venge ViAS, and a selection of the fastest current aero frames. Same build (DA9000) and wheels (CLX60s rather than CLX64s for clearance on some competitor frames) except where integrated components are required. Sorry about the quality of the chart image. Its original purpose was to illustrate the relative differences among classes. Y-axis is CdA and each division is 0.002 m^2:
I’m late to the discussion, and I do not mean to sound confrontational, but in the interest of expediency, I am being direct: Every time I see a graph with no data on the y-axis I pretty much just throw it in the trash.( Edit. ahhh… now I see the divisions. they are barely visible on my screen but with no real values it still is lacking very important info) Also, without precisely detailing the setup of each bike, the data is really meaningless. Frame size, fit coordinates, wheels, tires, bars, saddle, bottles & cages, rider/no rider, ambient conditions, velocity… without all that data for each trace on the graph nothing can be learned from it at all. I understand that the vast majority of buyers do not know any of this and will just look at “5 minutes faster” and say “wow” but if you want to convince the slowtwitch crowd, you have to provide meaningful information.