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"Out of round" tires - noise like wheel bearing
Sounds familiar. In my 1994 100CS FWD, I started getting whirring
noises from the front end at 35K. I was sure it was a flaky wheel
bearing. Audi dealer said no. Trusted local tire guy also said no.
Finally, I borrowed a pair of wheel/tires and confirmed that the
problem was in the tire. The one bad tire was on my LF wheel & was the
same model as the OEM tires (were they Eagles? I've tried to forget).
It wasn't actually a roundness thing -- it had to do with cupping
creating rough edges around the tires.
What was bizarre is that the tire had more than 50% of its tread, my
trusted tire guy assured me that it wasn't caused by mis-alignment or
underinflation, it was not a tire defect, the tire guy could look at
the tire on the car and knew that was causing the noise, and that it
didn't affect safety.
He said I could buy a new tire but he suggested turning the radio up.