well I've decided to try out the S Drive AS01 tyre by yokohama now since I can't get hold of a539s in 195/45/15 anymore, no one has any stock and they are discontinued. Getting them fitting at Ears Motorsport tomorrow which is on the end of the cat & fiddle road so should be able to give them a bit of a test on there after they are fitted. It was either that or toyo t1r so I thought I'd see what these new yokos are like. They are apparently the replacement for the a539.