Tires bow out - 1986 Ford F 350

Bows in at top or bottom? More than likely
you need your suspension aligned. The tire just follows the suspension. Misalignment can cause tire wear and handling problems. Front wheel drive cars need 4 wheel alignment to insure the back isn't steering the front. Other causes are shock/strut or control arm bushing wear or failure. Tie rod ends or idler arm wear can cause tire wear as well.
All parts should be tight and serviceable before alignment.

upper control arm bushings are bad or,question i had to ask my kid,were you jumping it?then the frame is bent

tie rods.check bearings and ball joints.

Have the rear suspension checked and fixed and an alignment done. If someone did this already take it to a different shop

Most likely bad wheel bearings or struts (shocks). If you never replaced them, I would say the struts are bad causing the alignment problem ( toe or camber) to your wheels.

Please rate this answer! Thanks, Mike

Camber not adjusted properly. Get an alignment.

That car has an independant rear suspension that has either been mis adjusted or something is broken. These rears have to be aligned just like the front suspension.

it could be a alignment are ball joint or tie rod checkout these websites www.autozone.com and the other one is www.alldatadiy.com if all fails stop by discount tire or bell tire and have it checkout.

sounds like your problem is a bad bearing

It could be wheel bearings/hub, ball joints, bent a-arms, or a-arm bushings. Good luck