Hello, have a problem again. Was at the tyre dealer around had my summer tires installed. Now they have forgotten at least one ring. I don’t know for what the good one is, but mounted the one I believe belongs exactly in the middle, have attached a photo. Is that now bad that they have forgotten it? I have addressed the extra, they just said that that wouldn’t matter. But for what then are these rings? For a short answer I thank you. LG, Stefan he