33s or 35s
 

Ok, I know there are people out there that swear you can fit 35s under an F150 with only a 2 1/2 inch leveling kit. The thing I want to know is if I can fit 325/60/20 (35.35 inchsX12.80 inches) tires under my truck with the optional Ford 20 inch wheels that I got with it. I have a 2006 F150 4X4 Lariat Supercab with the 2 1/2 inch leveling kit on it. I have the up graded Ford 20 inch wheels with 275/55/20s on them. I don't know what the offset is on these wheels and I don't know where to find it without messuring it myself. I'm not even sure how wide the wheels are. They appear to be 9-10 inches wide. Any ideas?

Welcome to the site. I don't know either. I know the 17 and 18 inch wheels are 7.5 inches wide and have 5 1/2 inches of backspacing but I have no idea what the specs on the new 20's are.