what size tire can I go up to on my 2013 f250 id like to fill the wheel well up or do I switch over to 20s and put on 275 65 20 thanks for all help

 

I had a 2012... Just go for it!... get a 6" lift and throw 37's on it... you will love the look did mine on the factory rims...

 

 

if your tires are good now I would lift it It would look awesome... find a 4wheel parts location and use pro comp and have them install it and they will coer anything that wears for warranty that Fod won't cover because you lifted it