[MyFirstZ]

Even though the tires balanced you can still have a bent wheel. They will balance out but almost hop down the road and can most definitely cause a cupped tire. I'm assuming its a relatively lower profile to that's cupping? like a 40.

When they balanced them they should of visually watched em spin and checked.

But an alignment normally wouldnt cause coupling usually just wear. But if it is pulling that hard it could be a combo of issues causing it.