ok first Hello, 2nd a signature with truck info would be good you can add that in User CP.
next if you want info you need to post stats of your truck I went to your profile
2006 ford ranger sport 2w
sport 2w? 2wd , I would assume. you should have t-bar suspension still even tho your 2wd because your a sport, you can run 31x10.5x15 or 32x11.5x15 just fine if that is the case..
also at the top of the wheel forum is a sticky thread that can help you also: