I ordered my P85D with 19"s before the 21"'s were mandatory. My concern is the awful roads we have here in the New York metro area which eat big tires with thin sidewalls for breakfast. But I've always liked the way the 21s look and Tesla's deciding to make them mandatory is causing me to rethink my decision since I want to get the maximum performance out of my car. So I'm thinking of making my 19s my "winter wheels" and going with an additional set of 21s. Am I crazy?