The calculated distance (air line) between Zimmern ob Rottweil and Nürnberg is approximately 144 miles respectively 231 kilometers.
By car or train, the actual journey to Nürnberg is certainly longer, as only the direct route (as the crow flies) between Zimmern ob Rottweil and Nürnberg has been calculated here.
Air line (approximately)
231 kilometers
125 nautical miles