I just put a set of these on a 2009 Caddy dts. 235/55-17. This should be amusing. I will report back any interesting observations. This car just screams for Michelin Defenders, but I got a great deal on these and thought a uhp a/s tire is an interesting proposition on a luxury car. My initial impressions are confined to the rain, but they were great there. A little worried about tread noise and/or mpg decrease, but hoping they will be good.