Here is a link to Phil Knox, of Texas, and what he did to a half ton pickup.

EV WORLD: Free Fuel Riding on the Wind

Some I like, but some I'm just not ready for yet. The wheel disks look like the easy and cool thing to do.

By the way, the baler belting is too soft, too pliable. I took 72 inches of it and put in on my 06. Dropped my mpg by .6 over a 75 mile round trip, avg speed of 65 mph indicated.

I'll keep trying, I think 8 inches of something rigid would do.