According to my tyre dealer, I have a sawtooth effect on Continental Premium Contact 5 (205/55/R16) summer tires. Have these now mounted the second summer and now the noises. We have changed the tires from the rear to the front, the noises have been slightly lower, are still present. Had the same already with Goodyear Optigrip 91. I thought that with the new summer tires I am rid of the problem. With winter tires (same size) the noise does not occur. Can it possibly also lie at the wheel bearings? If someone has an idea / answer, I would be grateful. These sounds are annoying already… Or is it generally on the vehicle?