Largest tires on 18” wheels!

[SethGX]

So what modifications would need to be made for a 285/70/18 to fit the spare location? That is what I'd really like to run.

All this is good info, but his question was about the spare tire location. I know I have seen a few comments in different places, but I'm not sure if we have a definitive answer. I do know that if you get a 285 width to fit, which you can fit a 285/65 since it's the same diameter as 265/70, the extra width impacts the departure angle and you can see it hanging down below the bumper more.