ClassicomanoLuigi said:
Professional teams know this and there is not a huge difference between the best and worst combinations of frame, wheels, helmet, and skinsuit... because rider aero position of their body and frontal profile outweighs equipment.
I don't believe all wheels are basically the same at this point. I do believe that some companies who don't employ aerodynamicists would like you to think all wheels are the same and/or only weight and depth matters.
You still see a lot of deep V sections, or generic "toroidal" which hasn't actually been tested in a wind tunnel. I can't find a single mention of the actual cross section of the fulcrum wheels on their site or anywhere else, although they do boast fancy features like "Wide Rim Technology" which makes me think they're probably just old-fashioned in terms of shape. The companies at the forefront have marketing terms for their rim shapes: Zipp had Firecrest (now NSW), Enve has SES, HED has "stability control technology". Specialized pays licensing fees to be able to use HED's patents for their Roval line. The carefully crafted shapes help with handling in crosswinds (especially important when you're in an aero tuck) but also increase the range of angles where the airflow stays "attached" to the rim, i.e. doesn't become turbulence.
Disc wheels likewise can be either flat or lenticular. Some wind tunnel data shows lenticular wheels to be a lot faster for certain wind angles (the lens shape is asymmetric so left or right wind makes a difference). The best wheels also depend on the frame, e.g. how much space there is inside the fork blades or rear triangle.
Also, I believe you're contradicting yourself by saying the helmet isn't important but position and profile are: the helmet is a key piece of the rider's overall body shape. The helmet needs to smoothly fill the gap between shoulders, arms, and back. Skinsuits likewise cover the entire body, so even a modest change in a textile's aerodynamic properties can make a big difference. The UCI banned wingsuits for a reason.