I KNOW this, and said so. An F1 car however has a wheel track that is immense compared to the typical HPV. I joined this discussion only to 'respond' to ideas based on wife's tales. It's the "absoluteness" that you and another poster feel in your opinions that bothers me. Trikes make great racing machines, no doubt but quads exist for a reason, even if you don't think there is any need for them. Trikes are compromises between speed and stability. For the trivial weight of an extra wheel and some framing one can have both in a quad and tell me why the quad should have any greater frontal area than a trike.