I'd say something must have come loose somewhere or bent. I have worn the RE070's pretty unevenly ( and rotated shortly there after to even out ) at times and have never had an issue.

In fact tomorrow is the first wheel alignment it will have ever had in a bit over 3 years and that is only cos an ALK is going in.

Get it looked at asap just in case something is about to fall off ( Crawl under it with a torch and check everything you can tonight. Drive slowly and not in busy traffic if at all possible until fixed.

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Stoner & Webber 2011 World Champions