Yeah, the tire thing was also a thought, but the last time one went out of balance on me it also loosened the lug nuts first.
got a ping while driving and realized it had broken a lug and loosened the other nuts.

I took the slow way home afterwards just in case and am slowly working through the car to see if I find a smoking gun.
also had plans for new tires anyway.

went through the back and the rear tires today, will probably play around with the fronts and front end tomorrow, but since the steering wheel didn't shake, wasn't even sure if that could be an issue.