This is probably a common and overrated question but no one I have talked to can seem to answer it. What is the largest tire I can fit on a stock f150 xlt supercrew.

 

33's i believe. im running 285's but a while back i took a quick measurement to them and they were just 31.5 i was in a hurry but that was what i got but. but ive hit some serious stuff for it being stock suspension wise i had no probs so deff. go bigger.

Is yours a 4x4?

 

Yes 4X4 rhino lined, westin grill guard, grill insert, piaa 525 series, roush racing exhaust, neoprene sport seat covers, trail gear floor mats k&n intake kit, no programmer yet not sure if it's a good deal for the price/

 

Sounds like you have a nice truck!

 

It does sound nice post some pictures, I'd like to see it. As far as a programmer being a good deal for the price let me just say that it will out perform all your mods combined. You will love how your truck drives with it. I have an Edge and it a great tuner for the money but if I were you I would get a custom tuned programmer. It will outperform the Edge with your mods. Give Mike Troyer a call (540) 965-7123 TroyerPerformance.com