was reading that the 33x10.5's barely rub on a stock lift, compared to the 33x12.5x15's. I was thinking about getting some 33x10.5's for the front and running 33x12.5's on the rear of my 88.

anyone done this, or better yet have pics? they will be Bfg all terrains by the way....thanks

stock 88 bronco.....15x8 american racing rims with 31's right now

 

I ran 33.12.5 15s on mine before I lifted it. They rubbed on the pivot arm but only because of the backset of the rims. Now that its lifted 4 inches and I have new 33x12.5 (although they are half an inch taller in actual measurement) I still rub, almost in the same spot. Its all about wheel backspace!

 

I run 33 x 12.50's on mine with minor rubbing at full turn. They never rub during normal driving unless I purposely turn the wheel all the way. I wouldn't go with different sizes front to back. They will never rub unless you make them rub.

 

The stock wheel backspacing is approximately 4.5". 32's are about as big as you can go and guarantee you won't get rub on the radius arms with the steering hard over.

Keep in mind though that actual tire diameters are going to vary slightly from manufacturer to manufacturer. If you are planning on running BFG A/T's then check out their website and look up "actual tire diameter". The nominal measurement applied to tires for sales purposes is typically just a little bigger than the actual diameter of a new tire. For example 33" BFG A/T KO's have an overall diameter of 32.7" when properly installed* and inflated. What difference does 0.3" really make? When it comes to rubbing issues it can make or break.

*BFGoodrich (and most other tire makers) will not warranty any tire installed on a wheel that is more than 2" narrower than the section width of the tire.