Fritz,

Sorry if I misinterpreted your comments, but for sure this is Porsche's own position and your explanation for why seems perfectly rational.

As said, it was the salesman not the service department that suggested narrow tires and, no, he didn't have Porsche's recommendations in hand. I e-mailed RC's post to him after our conversation.

My only aim here is to ensure that I have a good and appropriate set of snow tires for the winter since I will take delivery of the car in November.

It has been my experience in the past that the more exotic snow tire types ans sizes tend to sell out quickly: e.g. 295/35 19"!

Paul