what is the biggest size tires i can put on my ford f150?

[Jordan W]

i have a 94 ford f150 4x4 and I'm looking to go up in tire size. it is completely stock. what is the biggest size i can put on it without causing transmission problems and rubbing

 

[Sui Generis]

265/75/R15

Unless your looking for some rims thats a diff story.