Can I do it without rubbin?
Most Manufacterors list their 305 series tire as 12.5" width. I think the 325 or even 315s will be cutting it close to fit.
Here is a pic of my 305-55-20 Mickey Thompson ATZs on stock 20" rims


I think that a 33" tall tire is plenty with a 2.5" level... but a 35 will fit too. But I think a 295 series 35" works better... little, less or no rub.
BTW, my these tires rub on the sway bar on my 09.
I think most guess that run a 325 tire on stockers, are running 18s. Stock 18s +35mm OS, stock 20s +44 OS
Here is a pic of my 305-55-20 Mickey Thompson ATZs on stock 20" rims


I think that a 33" tall tire is plenty with a 2.5" level... but a 35 will fit too. But I think a 295 series 35" works better... little, less or no rub.
BTW, my these tires rub on the sway bar on my 09.
I think most guess that run a 325 tire on stockers, are running 18s. Stock 18s +35mm OS, stock 20s +44 OS
Its not the metric part that gets confusing. Its the aspect ratio, the second number is a percentage of the overall height in MM. Why the hell didnt they just make it height in MM and width in MM like a SAE tire?
I tried 35/12.50/20 mud grapplers on my truck the other day to see if they would fit. I even put a 1/4" spacer on to help out and it was touching the ball joint while the wheels were straight. I have been looking at the 295/65/20 (35x11.6x20) Trail Grapplers and those seem like they would be the biggest tire you can go height and width without any rubbing.
I just bought a 2010 F-150 FX-4 and put some toyo 33" mud terrain tires on it. Don't do it with the stock 20" rims!! I placed a 2.5" leveling kit on it and it still rubbed the upper ball joints in the front and they rubbed against the plastic shock covers in the rear. I recommend placing offset rims if you are going to go large on the tires.


