Okay guys i have a 2005 2wd f150 lariat, i have the stock 18" lariat rims. My tire now is stock, 265 60 18 i believe. Ive been trying to find out the biggest tire i could get. People (experts) have told me285 55 20 was the absolute biggest i could fit on a leveled 2wd f150...it would seem like i would be able to fit like a 305 55 20. Thats the size i really really want. HELP PLEASE!!

 

They will fit if you use a 9 inch, or narrower wheel with 5 inches of backspacing or more. You are basically wanting to run a 33x12.50 tire (305/55-20) vs. a 33x11.50 (285/55-20) tire.