I've got an '06 FX4; If i add a 2 1/2" leveling kit I'm wondering if 35x12.50R20LT Nitto Mud Grapplers will fit on my 20" OEM rims (20 x 8.5 w/44mm offset?) without any rubbing.

 

It should...lots of guys run 35's on factory rims with 2" level kits (2.5" should only be better. I dont think the offset for the 20's is any different than OEM 17's or 18's. Look up a member NEBRASKA i think he has that set up in his gallery.

 

I agree. I think it will work.