Hello all, I am a little confused about the allowed tire sizes at the Corolla Cross and hope someone can clarify me. I bought a young used Corolla Cross a week ago. The summer tires have 18 inches, the winter tires 17 inches. I thought you could invest in beautiful 19 inch rims in the future and have noticed with horror that both in the vehicle registration and in the CoC only one size is registered: 225/50R18 95V Now too my questions: 1. How can it be that the winter tyres stand on 17 inch rims? Should they not be registered somewhere? 2. Should I buy 19 inch rims, I have to register them in principle, or are there exceptions? I am a bit confused because I always thought that unregistered sizes must be entered and removed from the TÜV. On the common rim purchase websites I am also shown 19 inch rims, for which I allegedly do not have ABE , TÜV acceptance and registration need. Can anyone explain this to me? Greetings