Everyone is talking Rack, so I'll talk about wheels tires. First, you're looking at a tire for an 18" wheel, so that's not gonna work. You need to look for r17.Awesome catch, dude. I like this solution. I'm curious about the combo price. I'll report back. As far a s tires go, I was thinking of Nitto Ridge Grapplers 33x12.5oR18LT.
That being said, 11.5" tires about as wide as you can go on a 7.5" rim, so you should be looking at a 285/75R17 or 295/70R17. Based on manufacturer numbers... you can get 33.9" tires by going 285/75R17. Just a hair under 34".
I plan go for the 295/70R17 Duratracs which will fit just fine on stock rims.