The summer tire of my son’s fiesta is in the dimension 185/55 R14 on 5.5 J rims (with 43,5 ET). I noticed that the flanks of the mounted Semperit tires are quite soft and actually always look like they lack air, but that is not the case. At the same time they make strange running noises (I had already written about it in another thread). I also had the suspicion that the wheel caps on the tire flanks could scrub, since However, this does not seem to be the case, since the noise continues without mounted wheel caps. My question now is whether there are differences in the quality of the tyre flanks. Tires with a tighter flank would probably be the better solution for the car. Does any of you know anything more about this?