What is the biggest size tire i can fit on my stock 1999 ford f150?

[Coley Oley:)]

also, what is the biggest size tire i could fit on the same truck with a 3 inch body lift?
if spacers are need, that is fine but i would like to find the biggest size of tire i can put on the truck with out doing too much.
i was considering the 3 inch body lift anyways
okay cool, would i need spacers if i got 33's?

 

[Derrick S]

Stock usually the largest would be 33" diameter, with a 3" lift you can go 35" diameter.