In case you thought fairings were just for looks, they aren't. It's amazing how much of a difference it makes. Put one on my old Acura TL and I've got no complaints. Mounted to round crossbars. I ran into trouble trying to figure out what size to get b/c when I went to Yakima's site to determine, they don't really tell you. So give Yakima's customer service a call, or chat with the good folks at Backcountry, to help you determine proper sizing.