On my 2010 Roadster, I have not experienced your problem. In fact, from the very first ride, I was more than amazed that I could see behind me very clearly. I assumed that with so much mass moving, they would be worthless. I haven't had a problem at any RPM. Not sure if that's typical of the Roadster or is I just got lucky. Either way, I'm replacing them soon just because I don't like the look of them. Maybe I'll list them on here to sell since they must be from a good run.