Hello together…. ….have reared my summer tires again last year, which started to “sing” a bit. I have now driven a bit of a highway again, and at 160 km/h it gets really loud. A car master told me, after he had “stashed off” the tires, that they all had the “saw tooth effect”. Did this happen to you already?? Did still have the factory tires on it from Conti…. Oh yes….he still said I should put down a proper burn-out, then I could It could be that it might get better at the front….