I've never heard of this on an Audi. In fact, I was under the impression that mag wheels were more brittle (due to the aluminum content) and were more apt to crack than bend or flex. Why don't you go see a wheel specialty shop and ask some questions.
looked into that also, those replicas dont fit Rs4's. Audi even do an official replica which bizarrely fit everything but an Rs4! Anyway I don't mind the big bill as such just not if its just a way to get my money.
I'll let you know what happens when I get round to taking it to a wheel balancing centre.
Oh and incidently it seems fine on the road after a change of disks...
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