Hello, can I install larger tyres with the new registration certificate part 1 without having to register anything? When buying a used car I got 15 inch summer tyres. However, only 14 inch tyres are registered. A tire configurator spits out 15 inch rims on the internet for the rims to my car. I have read that you need this CoC certificate because in the “new” registration certificate (certificate of approval part 1) not all approved wheels However, it costs 100€. With my car it is not worth it. Did I understand what is wrong or do you really need this extra certificate to prove that there may also be 1 inch larger wheels on it? Addendum: I just found a document of the Tüv’s in which it says that the tire with 15 inch rims is allowed. But do I need this CoC certificate? Damke and best regards