Just a quick update now we have our car back from its radiator replacement. We fitted Continental Sports Contact 7 XL's all round. Our Plus Six has 18" Sportster wheels and the SSL suspension upgrade.. We have now covered around 150 miles on the new tyres and so far we have found them to be excellent. A much more comfortable ride and very good grip, maybe a tad heavier on the steering though. Time will tell how the tyres handle as they wear and age, but so far very pleased with them.
Dave