Also look at the attached pictures! To the history, the car is a VW Polo. BJ ’98, 219,000km, first owner, accident-free, is driven only by my wife, 50% highway, 50% country road. It drives very restrained, the car consumes not even 7 liters although already so old. Tyre size is 175 / 65R13T. It developed a noise, like a starting wheel bearing damage. The workshop changed the one wheel bearing front to the right. The noise was then partly away. We had to change the wheel bearing at the front left. That didn’t help, and we didn’t have to pay for the other wheel bearing either. The noise wasn’t gone yet. VW Workshop Master: Mmmm… A defective gear bearing sounds different. A differential noise is load dependent, and that’s not so. Yes, well, then we don’t know. Load us the tyres at the front and back times to exchange. That brought about about 60% remedy. His recommendation: soon must And then see if the noise is completely gone. That was now before 2000km. There were all four tires normal, 3..4mm profile. Maybe every time 2000km didn’t check his tires, I think. Today my wife brought the car back from the workshop, with the summer tires in the cargo compartment. That hit me! We are not such gypsies, that we deliberately drive the tires to the steel! That was of course very dangerous. That’s in 2 Like the one good tire (picture 2), all four tires looked like that before 2000km! I saw it myself. Unfortunately, I don’t know for sure whether the tires were in front or in the back, but I think in front, because the noise came from the front. The disc brakes are ok, don’t grind. Now after the tyre change (winter tires) the noise is gone. My question: How can something like this happen?