I will try to make this painless because these questions are asked over and over but I hate to spend all this money w/o asking again. I have a '06 screw 4x4 leveled 2.5 in the front with 18" lariat wheels. I want to go up to the 20" Motto's (20x10, 18mm o/s,4.79b/s) with Nitto's 305x55x20. I am willing to trim a little but not alot (re-sale). Also, what will I have to do to the computer with the different wheel/tire size?

 

THey will fit with minor trimming.
You don't HAVE to do anything to the computer, but your speedometer and odometer will be off slightly (how much depends on your OEM tire height).