by HARDTRAILZ » Mon Nov 10, 2014 11:18 am
I have posted many times about the different roof setups and MPG affects of them in my experience. I have not only ran a cargo box, but the flat rack, the basket, and the basket with a low deflector I have reported on.
Basically, in my experience...The flat rack and low deflector on the basket are a similar 1.5 ish mpg loss. The basket w standard fairing was a bit more. Prolly 2 or so. Loaded with tire or boxes up top is a few mpgs loss depending on wind. Definitely more noticable. Also they seem to have less affect on driving below 60 mph or so. I really only seem to see the high interstate driving really get affected. In town and such I don't think the aerodynamics are as big of deal.
Some say the crossbars affect things, but without a basket or rack I saw no difference in leaving the crossbars off or keeping them up there.
I hate to advocate weird chemicals, alcohol, violence or insanity to anyone...but
they've always worked for me.