[MFresh]

It all depends on what you want to do with the truck?

1. Stock or lifted (if lifted how high and what kind)
2. do you want more wheel and less tire or less wheel and more tire look
3. wide stance or tucked in?

Just to get you started you could fit a 20x8.5 wheel with 33's on a stock height truck if the Offset/BS are pretty much close to stock specs. Just don't go too wide on the tire.