on what you are driving as to the extra for gas. I haul one or two kayaks on the roof of my 4X4 Silverado, and the highway mpg for cruising at 60 mph is about 1/2 mpg less, 16 1/2 vs 17. While there is a noticeable difference in reaction to wind, it doesn't cause me problems. I would have serious problems turning around with a trailer some of the places I go. The bottom line is that no one solution fits all.
Heel and Pegpads™
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