[lunarhighway]

i think it's fair to say all these dams where sized in the wind tunnel to be as eficient as possible without compromising minimal ground clearance and likely style too.

i read in an old autospeed article on these things that to large would once again cause drag, but that these dams also had an effect on front lift, so it's likely they're designed to strike a balance between these things.

to me it seems most are more aimed at keeping air away from the gap behind the wheel where the suspention is, rather than the tire itself