Well, if the only thing you changed was your wheels/tires before the noise started, it is likely the cause for the noise. By raising the car and spinning the tires you are taking the weight off the suspension. So the wheels hang lower and would give you more clearance so, there would be no rubbing.
I would check the inner fender liner and look for signs of rubbing. Also, try removing the spacers and see if it goes away. If all else fails you should take the car to the dealer and see what they find.
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