Guessing I need an alignment...?

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I agree with this from another website. Scalloped tires usually mean worn or bent suspension or possibly out of balance tires.

"Tire is scalloped:
when the tire is scalloped or cupped across the tread it is usually caused by bad shocks or struts. This can also be caused by out of balance tires. Jounce the front end to see if it oscillates and test drive the vehicle to see if it floats and leans excessively around corners. Bad struts are the number one cause of cupped tires."