Have put 2 nokian z lines on the front to replace conti sport 3's on my clk 320 cdi sport, only done a few hundred miles, so early days but very impressed to date, they really are as the other reviews on here say about them, quiet, ride well, very stable, a considerable improvement on the conti 3's, have tried pirelli and michelin in the past, these are better to date, if they see a sensible mileage too then highly recommended