what are the biggest tires I can put on my 2004 f150 4x4 without tires rubbing and without a lift.....I want more aggressive looking tires....

 

i think a 33 or a 285/65..u could level it and get a bigger tire though alot cheaper than lifting

 

275/70-18 offers an inch taller then stock 275/65-18's. That size will give you many different tires to select from and they tend to be cheaper because it's a stock size for Super Duties with 18's but they are only available as E range LT tires.

I ran this size on my 07 and have been very pleased with the look and all.

 

if you have 17 inch wheels and have 255/70/17 on now, 265/70/17 will give you an inch, 33s will fit without a leveling kit, 35s will fit with a front leveling kit

Here's a good site too: http://www.4lo.com/calc/gearmetric.htm the calculators on the side are pretty helpful

 

if you want big tires just put a level on it and throw some 35's under it. i got my 2.5 steel level kit for $60 shipped from hellbentsteel.com. another 150 for install and alignment. wheels and tires m&b w/ shipping fro 1300 so total in was $1510 to go from stock to this