First of all this is about the worst addiction I have ever had. I got a fantastic deal on 1991 Jeep Wrangler, 2500, completely overhauled motor, rhinoline, re-sealed, transmission excellent, new paint job, new tires, new top, just perfect. Since then my great deal has cost me a small fortune. ;-) Bumpers, side bars, I am looking at a lift kit but the short term goal is a set of after market rims for my 91 wrangler. I have no idea what the lingo means. I believe I need the 5 x 4.5 bolt pattern, I have new tires that are 31x10.5x17, these are on the factory rims 15x7 rims. Do I need the 5 x 4.5 or the 5x 5.5?