I have a stock 2006 FX4 with 18" factory wheels. I currently have 275/65/18 and i am looking to go to a little bigger tire. I do not want to put a leveling kit on. What is the biggest metric tire size that i can fit without any rub at all. Can someone help.

 

A 285 will be the biggest you can fit with no lift.

 

So a 285/65/18 will be the size i would want. Will that size look bad on the truck. will it make it look like it needs a lift?

 

That's just enough tire to fill up the fenders. It will look great.

 

RIght, that's basially a 33x11.50-18 tire.

 

What is a 275/70/18 equivalent to? Will it fit on the truck?

 

Yeah, they will fit. That would basically be a 34x11.00 tire.