Crap on the roof will impact the fuel economy of any vehicle. Most people aren't driving around every day with 3ft of stuff strapped to the roof. Occasionally on a few trips per year is fine, you simply deal with the reduced fuel economy accordingly for those few days out of the year. These aren't 8 mpg trucks so I don't see the issue. If you're attempting to get 16-20 mpg with a 5,500 lb lifted, full-time 4WD SUV, fully loaded with gear and people running 70+ mph down the road then you're going to be disappointed.
Toyo released their new ATIII Open Country, so I am giving those a test. LT255/80 R17, which is about 33.1 x 10.5. A good size for the GX IMHO
Really enjoy the podcasts as well.
Which one is that?
The Overland Journal Podcast
Welcome to the Overland Journal Podcast, where we share our experience overlanding on all seven continents, along with our insights into the industry- its technologies, products, and innovations. Each episode features in-depth discussions on topics ranging from equipment to travel destinations...overlandjournal.com