Hello, I once experienced a loud howling on a highway ride (see other thread, loud squeaking, screeching + steering wheel flutters). However, it only occurred once, but was so massive and long that I could only drive home very slowly. After the other possibilities were largely excluded, the wheel bearings are for example ok, I found the possibility that it could be the tires (saw tooth formation). One has given a catastrophic assessment, should not drive a motorway for a longer time, but most others said that this was no problem, but the tyres were not in such a good condition anymore, others said it was totally ok. Perhaps the dealer wanted to sell me new with the very bad assessment. Moreover, the steering wheel flutters extremely from 130 km/h and the bouncy has a very bad straight run; on close landings I had the tires balanced out today, possibly the vibration of the steering wheel is now gone. They are retreaded cheap tyres of Trayal (winter tires, were turned on by the salesman of the car as all-weather tires), from 2008, had the car for 5 weeks. If the noise came from the tires, it would not have to occur continuously or more often? Or is that dependent on the heat, floor covering, speed etc.? What exactly is a saw fence image? ung? I’ve googled and looked at photos, but as an auto layer I just don’t get smart about it. What’s uneven: the longitudinal direction of the tire, if you stroke over it or are it uneven in the transverse direction, that a block is higher than that next to it etc. or possibly both or the different height of a block. The longitudinal direction is ok according to my estimation, but the individual blocks (stoll edge) are extremely different. glaringly explain e.g. an assessment whether saw teeth also includes a different height of the stoll edges in transverse direction. Thank you! Dawson