If it only happens above 45, I'd still think it was a balance problem first, a tire problem second. (All brands aren't created equal)
Before spending a lot of money, put the 17's back on. If your problem disappears, then you know it's the wheel/tire combo.
If the problem persists, then you have a warped rotor, bad hub, or axle shaft/CV joint.
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Tuesday, September 14th, 2010 AT 7:53 AM