Hello, I'm looking to buy rims and tires for my 15 XL Supercrew. I was wanting to put 20x9 inch rims but not sure what the biggest tire size is I could fit without rubbing? The truck will be stock height. Any help would be great!

 

4wd has more clearance than 2wd. You didn't mention which yours was. I cannot personally answer your question because I am not familiar with the 2015's, but the added info will certainly help you.

 

Thanks for the looking out. It's 4wd and I may put a 2.5 inch leveling kit on.

 

Not me but my buddy has 35X12.5 on his stock f150. No rubbing issues according to him.