I recently brought a 04 supercrew fx4. It is totally stock, but my question is if i put a 2.5 leveling kit on it, what is the biggest tire I can put on with no rubbing? As far has height and width. Thanks

 

You can fit a 35x12.50 using the oem wheels but they will rub slightly on the control arms at full steering lock. Anything smaller shouldn't rub at all.

 

what is when with aftermarket rims that are 18". Is the biggest now 33 x 12.5

 

The diameter of the wheel doesn't matter. It's the width and backspacing on the wheel. A lot of people use 33x12.50-18's but the 325/60-18 (33x13.00) seems to be a more common size. I'd suggest a 9 inch wide wheel with 5 to 6 inches of backspacing.

 

how far is this going to stick out compared to stock tires.

If I was to go the with 325/60/18tire with the 18x9.5 wheel with +30mm 6" BS

 

What size are your oem tires?

 

275/65/18 with factory 18 inch rims

 

A 325mm wide tire is gonna be 50mm wider. So, half of that is 25mm meaning the tire itself will stick out another 25mm.