I've got this problem too. At thispoint I have M3 control arms, new tires, new rims. The wheels have been checked, balanced and road force balanced multiple times now. M3 control arms made the most significant difference. The shimmy is now gone from the 40-60 range, but now rests around 80( lol...btw lots of M3 posts about shimmy around 80 too). Not sure whats next. Any ideas are welcome.
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