[Ryan2011dieselpower]

Whats the biggest size tire i can fit on my stock 2011 F350 FX4. I will be using the stock 20" rims as well. Was thinking 285/65/R20 or 325/60/R20. I don't want any rubbing. Thanks for the help and feedback...:icon_ford::icon_ford::icon_ford:

 

[mor4wd]

I don't think you can run anything wider than 285. That's 11.5", a 325 is a bit wider than 12.5". Somebody else will chime in soon.

 

[AlbertaStroker]

I ran 325/60R20 wrangler duratracs with a slight rub at full left turn. So a 285 should be just fine

 

[mysticblu999]

I think there are some guys running 295/60/20 34.4" tall