Standard original fitment was a 480-12 crossply tyre, later moving to a wider 500-12. By the 1970s there was also the option of a radial 135R12 tyre, or wider 145R12.
NSU's entry into the popular European small-car market of the 50s and 60s was quite advanced. and popular. Eventually, little cars with air-cooled engines went out of fashion.