I tired of the KO2 noise quite early in their life then spotted the late 2017 release blurbs for the AT+ so have been keen to change over. I had 2 sets of rims for my previous 3.0 D4 along the lines of a wet and a dry conditions set but never seemed to have the right set fitted so returned to having a single, multi-purpose set of tyres. However I live in a rural area and was last in a city when I bought the RR nearly 4 years ago.