Re: True 33X12.50R17?
Your stock rims are 7 1/2" nominal, just like the off road pkg. alloys. They are closer to 8.5" with a tape.
You can run a 305mm (12 inch), wide tire on them. Some of the narrower 12.5 inch tires will work. The narrow rims will pull the width in 2/10 of an inch, for every half an inch that it is narrower than the spec rim the tire was measured on. If the spec for a tire state 12.3" width on a 9" rim, usually like 8.0(9.0)10.0 meaning the specs are measured on the one in parenthesis or bold font. So take the spec rim minus your rim's nominal width and you have 1.5" or 3/2" so 3x 2/10" is 6/10". 12.3" - .6" = 11.7".
My BFG AT KO tires are 11.1" wide on the 7.5" rims, but they are advertised as 11.5" tires, (on a 8.5"rim).
Do you really want them wider, or to just stick out more? If you get an aftermarket rim with a 4.5" backspacing, it will stick out an inch more than the stock 5.5" backspacing, and get a 8.5" rim and there's another inch.
Last edited by NorCal 4x4; 05-15-2007 at 10:30 PM.