I would think this is inevitable with a more aggressive tire. I went from the stock eco + tires to nitto ridge grapplers and have experienced a 1 mpg drop ever since. But a much better driving experience so well worth it
Yes I’ve got Landspider WildTrax 275/65R20’s much better off-road and fill the wheel well much better. I have stock suspension and only slight rubbing at full lock over bumps. Never heard it only see after.