Originally Posted by PowerStrokeHD

I definately agree with Pocket on not running 325's on your factory wheels which are 8" wide. It is usually OK to be a half inch off recomended wheel width, but not a inch or more.

I had 35X12.50R18 Pro Comp Xtreme A/T's on mine and loved them in the snow. They do have a 8.5" min rim width, but work OK on the stock wheels.

Pro Comp Xtreme All Terrain Radial Tires - All Terrain Tires, Pro Comp Radial Tires

Another good choice is 305/70R18 Mickey Thompson ATZ which has a 8" min rim width. Very similar tire to the Pro Comps and have heard nothing but good about them.

Mickey Thompson Performance Tires & Wheels

Mickey Thompson, Pro Comp and Dick Cepek are all good tires. All are owned/manufactured by Cooper Tire...