Ok, so I'm gonna get a dark blue 04' Avalanche without cladding off a buddy. Its a 2 wheel drive Z66 packaged truck. I'd like to level it out and throw a set of Mickey Thompson Classic II's on there. I dont have the funds to lift the truck currently so it'll get a leveling kit. whats my max tire size without any modification to the truck? I'm having a hard time finding the right info for these trucks, I even searched the Avalanche forums but most guys are running 20"+ street wheels.

I'd like to wrap these wheels in Nitto Terra Grapplers. Any advice would be appreciated. Here are the wheels & the only pic I could find anywhere of them on a Avalanche without at least a 6" lift.