Hey everyone I am new to this site, and I have a question. This may have already been discussed and if so sorry for but I need some help. I am getting some new 18" gear rims for my Black 2012 XLT Crew Cab 4X4. I would like to know if anyone knows how large of a tire you can put on these trucks without lifting or leveling the truck. I was thinking about maybe 305/65R18 tires which are 33.7" tall and 12.2" wide or 275/70R18 tires which are 33.2" tall and 11.0" wide. Any help would be fantastic, also not that it matters but I have the 5.0 and love it!