I got a letter from the workshop in Hamburg Norderstedt. I just didn’t get the letter, but the content was the following: Your winter tyres are worn out. The profile depth is no longer ok. Here is an offer for new tyres. You can certainly think of the prices. Important information: I bought the complete wheels in May last year cheaply in another branch of the chain. Mhhh. My call……how is the profile depth? I waited….on the phone …….then came the statement….. not………then they called me today. Their winter tyres are porous! And from the end of 2016! Ahja. Porös….not even 4 years old. OK…..remarkable Can they please send me pictures? With the pictures. What do we see here? Damage in the profile at one point each on all 4 tires. Well, what do you think about it?