Q. I recently took a relatively long trip in my 2010 Mazda Miata. The car has about 39,000 miles and has always been dealer maintained. I noticed at highway speeds a slight vibration in the front, and I am planning to bring it in for tire balancing. But I am wondering if there could be other issues causing this vibration. The car is a summer car and sits outside on a wood panel floor all winter. I have done this for as long as I have owned the car since 2010. I would assume if there was a flat spot in the tires, I would notice it more prominently than just a vibration. Do you agree with that? Any other thoughts on what might cause the vibration before I do my own diagnosis?

A. The first place to start is with the tire balance and careful inspection of both the tires and the wheels. A ti

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