My S has the 21in gray rims. I love the look. The previous owner also gave me a set of 19 inch standard rims that have Pirelli sottozero winter tires on them with decent tread left. I live in North Carolina, I don't need snow tires. I was thinking about putting the other rims on for the winter and swapping back out in the spring. I like the idea of spreading the miles across the tires so the 21's last longer. I don't like the look of the 19's on this car but I have tires with tread, why not use them. What would you do?