[MingLu]

Originally Posted by MichaelInChicago

Minglu,
When you hit a pothole, especially wheels with low profile tires on them, the lip of the wheel can bend slightly due the impact, and these slight bends can be on the outer (visible) lip or the inner lip of the wheel and these bends cause the wheel to be slightly out of round and thus can cause vibration at higher speeds.

Got it, Thanks a lot!