Meal! The tyres on my new 69er Galaxy XL convertible are 17 years old, I have already seen before the purchase, but now it is concrete. Currently there are white wall tires on it, front 225/75 R15, rear 235/75 R15, but in appearance only the 225er are registered. I would like to have the classic Cooper Cobra GT because of the white letters. However, according to my research there are not in /75, only in 225/70 R15….or even in Breiter up to 255/70 R15. Broader would not be wrong to me either, what kind of tyres are available in /75, only in 225/70 R15…. or in Breiter up to 255/70 R15. i 255 is probably too much for the rim (but don’t know the rim width at all). So, what do you do? On the one hand I could just drive the current flaps, then I can at least leave bitle rubber on the road, but 17 years are not exactly a safety garant…. Or at times go to the TÜV or similar, and have another size entered? Who has experiences here, whether and to what extent this is possible (of course the respective examiner, which can not be influenced, a Is it possible to get 235/70 R15 registered? Roll circumference changes yes, is the tachorelevant? Is it easier to vary in width or cross-section? What would be maximum possible? And is that reasonable, because at some point I have balloon tires…. in any case I want to keep the original rims. Do you have alternatives to Cooper Cobra, which are also quite pleasant in price? Retro Classics tyres with white wall are bitsle cheaper, but come in my opinion not quite soo good, Maxxis oldtimer whitewall are expensive…. Finally: Driving another tire size simply without registration will probably not be the best idea…..or what does the friend and helper say about it? Greetings, Gunter