To the OP - there's a reason why these threads need to ramble for a bit - gives people like me a chance to see them as we don't get to the desk most days, and then we can occasionally chuck in something (maybe) useful later. On the original question, I have just changed to new tyres and went with the original spec Avon Rangemaster 750 x 16. (ATS can still get them and price wasn't bad). It has made a noticeable difference to how my S3 steers, in weight and more impressively in line stability. Vehicle now seems to wander less and steering feels more "direct". Also a bit easier for slow manoeuvring but still glad I have the original size steering wheel. Had a mix of tyres on before from different manufacturers (1 Michelin, 2 ancient Avons and one other I cant remember) but all the same 750 x 16 size - incidentally, was surprised how much variation there was in tyre height between these three types when stood side by side off the vehicle, although all same stated size. All the best..Ian