This is what I run, in a KM2. It's great. I had to trim the inner fender guards (well, technically the tyres did their own trimming for me...), but other than that it was a straight fitment onto stock OEM wheels. That's on a 2" lift.. If he won't be doing hardcore wheeling 245/75/16 is a great tire size; bigger than stock but not big enough to cause annoying little issues.
Cheers,
Matt