Hello together, I drive an A3 Sportback 8P BJ 2011. In spring I had new summer tires raised. Pirelli PZero Rosso Asimetrico 235er. Now I was in the workshop to pull up the winter tires and it was found that the rear tires were much more driven than the front. i.e. rest profile front 6mm and rear only 2.5mm. Before the summer tires were pulled up, also a chassis measurement was carried out. Lt. statement of the workshop were There is no plausible explanation why this unusual wear has happened. In the year before there were no abnormalities in the wear of the tires. The abrasion at the rear is symmetrical and even and the workshop says it can only be on the tires. I am at the moment rather perplexed as to the cause. Will now measure the wear of the winter tires weekly and check whether this continues. Has someone ever experienced this or not. an idea what this could be about? Brakes in the back are not fixed.