[wilf leek]

Mike - there is a wheel available for Cobra replicas in the UK just like that, fitted to a range of cars made by Gardner Douglas. Like you, I have to wonder if the rotation speed of road wheels is anything like enough to counter other airflow effects.

Richard - your comment about all-carbon brakes is interesting. As a fan of F1, I have often noted the billowing dust cloud coming from the brakes on those cars under heavy braking. If only 5% of braking energy is retained as heat in the system, it says a lot about overall retardation on those cars, as the rotors can often be seen glowing yellow-hot.