Re: 2012 jgc limited tire sizes
That's interesting. I was planning to use 265/65/18s on my new Overland since that size spare also fits in the spare compartment and allows the lid to fully close. I also thought the 285/60/18s would probably rub on stock wheels. But if they do not, the 265/65/18 size could still be used as a spare in all situations, since it is the same basic diameter (31.5") as the 285/60/18.
Is this the combination you are using? How's the ride quality with the wider 285/60 tires? And did you notice any decrease in MPG from stock?