Valve, I think you're over-estimating the aerodynamic effect of the movement of the tyres. The cross-section of the tyres is huge, and this large cross-section is the overwhelming cause of the turbulence the tyres cause. Far less disruption is caused by the skin-friction between the rubber and the air, and even less than that is the result of the forward motion of the tyres' top side, relative to the air. Of course, there is SOME effect on the behaviour of the air from the fact that the tyre surface is moving, and that is partly why teams have invested the considerable amount of money that is needed to build "rolling road" systems into their wind-tunnels. But all I'm saying is that it is not quite as significant a factor as you are suggesting, and CERTAINLY not the main reason that aerodynamicists find themselves designing winglets and flips.