Sounds good man get some pictures up of your truck before and after, I have stock 20s and pirellis on as well.

Many say not 35s, with that being said look for a 275/60 which is a popular size.. 285/65 20s, around 285s-305s. Find the tire you want Id say, then view specs of it and their sizes so you can figure out the outer diamter and width.

Best suggestion is tirerack, what brands they carry you can view all outer diamters, the stock pirelli 275s are right at 32s so Id say a 33-34 inch tire. Nothing more. Plus youll have a noticable power loss the bigger you go.

275/60 is a beefier than stock size, and relatively cheaper than 285s and up.

 

Thanks Man! I really appreciate your help. I'm thinking 34" would be the way to go. Any idea which size this would put me in at? I definitely don't want to have to do any cutting or add spacers in the back.