With your leveling kit installed, you will be able to clear up to a 34" tall tire with no problems. This is of course assuming the correct wheel dimensions are used. Your factory tires (265/70-17) are about 31.5" tall so any tire taller than that is going to help fill up the wheel well.
I personally think size 295/70-18 is a great option for the Leveled LMM. Here's a tire size calculator you can use to compare different sizes.
Tire Size Calculator
As far as wheels go, here's a link with what we have to offer.
Wheel Options
As you know, we mount and balance every wheel and tire combination for free
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