Hi, I just bought a new 2012 (leftover) F-350 4X4 XLT- FX4 package, it came with 275/70/18 wheels & tires, I want to buy something bigger, can someone tell me if 35 X 12.50 X 18 will fit without any modifications being done to the truck, if yes, what is the max I can put on it without any Mods.

THANKS !!!!

 

Congrats on your new purchase. If your buying your tires from a tire shop.... if they want your business? they will let you try them on your truck. And continue trying tires until you find the size your happy with.
If not? shop some where else that will help you