Oddly, the vibration seemed (at the time, about a year ago or so) to have cropped up “overnight” (I don't drive on the highway often, maybe once or twice a month) and at the time I hadn't had the car up to those speeds in quite some time, probably about 3 weeks or so. I certainly didn't recall any vibration the … Damage the suspension enough to cause a wear item to prematurely wear and eat up the tire tread in that funny manner. Bend your crappy, cheapie wheel. …

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Piston Slap: To Love, To Hate Aftermarket Rimz | The Truth About Cars