That’s the widest rim I’d go with on 285’sI had 285/60/18 0n 8.5 on my 2003 tundra most of the time only need to run in 2wd .
Im thinking fronts will not work with the 285/75/17 those are 33.8” tall and 11.2” wide. I’m sure they will rub.
took the truck for a road trip still getting decent mpg . I’d say I lost about 1.5 to maybe 2 combined . I haven’t done the calculations.