[azraelswrd]

Try it with a cardboard mock-up to see the real-world results if its worth it between none/partial/full. Theoretically, the more of the well covered, the less turbulence created but how much of a difference is made from a partial to full skirt -- hard to say without testing on your own vehicle.

(you're right -- it does seem higher than normal, or rather it seems that way -- maybe it was designed to accomodate larger wheels or chains?)


EDIT:
and the EV-1 (or at least that's what I think that first pic is) is much lower to the ground AND it has side fairings in front/behind the wheel to further minimize underturbulence around the wheel -- which may be why they didn't go with a full rear skirt (plus for convenience and ease of access).