Sounds like a ford lol. Could be the suspension is sitting to high with out the proper parts to counter for the tire wear.

If it is a ford, You can get brackets to drop the truck mounted side of the I beam. Otherwise the only way to fix is to bring your suspension down, or have the I beams bent.


**Note- I Dont KNOW that this is a ford. But It does sound like a ford symptom. My dads GMC was also doing the same thing. Lower control arm was actually bent sucking the bottom of the tire in.