Hello Robert,
Here are the tire and wheel recommendations provided by Fabtech Suspensions: Use 35/13.50R18 tires w/ 18x9 wheels w/ 5 3/4" BS w/ minor trimming, Use 35/13.50R20 tires w/ 20x10 wheels w/ 5 3/4" BS w/ minor trimming, Use 355/65R18 tires w/18x9 wheels w/5 3/4" BS w/minor trimming or Use 37/13.50R20 tires w/20x10 wheels w/5 3/4" BS w/minor trimming. Please Note: This kit fits extended and crew cab models only. Thank you for the question.