Hello together, if I buy new complete bikes for my BMW how does it look like with the registration? At the moment there are registered in the vehicle certificate 205R16. I would like to climbers but original BMW complete bikes 225R17 (mixed tyres). A BMW dealer told me, since they are original tyres I don’t have to do anything. Is that true? Do I have to have nothing registered in the vehicle certificate by the TÜV? Or do I need an additional paper for the tyres, that then together with the (unchangeable) Is the vehicle registration valid?? Greetings