When I first started in the tire business many years ago, one of the first things my dad taught me was how to diagnose a vibration. Vibrations, he told me, follow the path of least of resistance. For instance when you feel a vibration in the steering wheel, it is most probably in the front suspension. When you feel it being transmitted through the car seat, it is probably in the rear tires. Of course that was in the days of solid rear axles, but you get the idea. One misconception I’ve heard for years is that a wheel alignment will correct a vibration. An alignment resets the suspension geometry to very specific measurements, it does not in itself address vibration issues unless there is a loose part in the suspension.