Sounds like a bent wheel to me also, especially if you hit the brakes after the front tire went through the pothole. The rule-of-thumb is to roll through a pothole even though your natural instinct is to brake. Hitting the brakes causes the wheel encountering the pothole to stop momentarily (when it has no contact with the road) which concentrates the force on one spot on the wheel bending it. Whereas, if you simply drive through the pothole the wheel continues turning and the force is spread over a larger portion of the wheel.

Wheels with low profile tires bend more easily than wheels with high profile tires because the low profile tires provide less cushioning effect when hitting a pothole, etc. Low profile tires also produce a rougher, busier ride if the car's suspension was designed for a higher profile tire.

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Fred Hoelzle