I have 17 monzas that will need tyres changing soon so I was thinking of changing them to 18 monza tyre prises not that different. Just wondering has anyone changed from 17 to 18 and did it make a big difference in ride, comfort etc? Seennloads of different descriptions of 18 I.e. diamond cut, black insides, chromed but what is then vw standard colour as supplied when new?