I have mentioned this before, but it’s appropriate to this discussion. My first Europa, 4339R, came from the factory with Dunlop SP Sports (I believe that was the name.) Fantastic handling. When replacements were needed, I bought the CN36 Pirelli, because the car magazines raved about them. They were awful, completely changed the handling. A friend who did a lot of Autocross agreed. We thought it was due to the change from fabric to steel belts, probably because the Europa is so light.