i plan on buying some 15" MT classic wheels with 33 X 12.5 procomp xterrain tires.

my question is will i have any problems putting these on my stock unlimited? will the 15s be a problem? will 33s be a problem? i heard from a local dealer that they would not. but you guys are the experts and wanted to make sure....

 

I ran 33X12.5 with a 15" rim 3.25 Backspacing, for about a 1,000 miles. I had very small rubbing problems (both front and rear), and only when flexing. I now have a 1.75" front spacer on, and no lift in the rear. I need to add a 3/4" bump stop ext. on the rear, and it should not rub at all. I'm using American Eagle rims, and there is NOT much room for balancing weights, between the rim and caliper.

 

so what does this mean? what could eventually happen? the caliper bracket could brake?

 

it means rim size is generally a product of brake size.

the new JK has larger brakes, and thus larger rims to accomodate.

my TJ came with 16" rims on it (Rubicon) and when I went to 15" there is a .0001" clearence between the rim and the brakes..

In fact; in PA inspection, you can't go smaller with rims; because of this.

this may be a misquote, but if I find the inspection manual I will look.

Your state may be different.

its like the new suburban... they didn't go to 17" rims stock for LOOKS.. (well, some what). it was to clear the newer bigger brakes, to stop squishing geo-metros...

 

You just do not want your caliper touching any part of the rim. So you are limited to how thick of a tire weight that you can use. The X-factor here is loose rocks.