Citroen C5, 245/45/18 in size. Primacy 4, PilotSport 4, and ContiPremiumContact 6 were the options. He didn't even think of the kontiki, and the pilot's sidewall is thicker and more rigid than Primacy's. Primacy seeks increased comfort; the pilot seeks improved handling. It reached 170 mph on a dry road (I'll attempt more), flying like it's on rails. No roll, sharp turns pass without the tiniest hint of drift, and the rearrangement is plain and understandable (within reason). I have not yet tested it on water. In a rut, one moves confidently without throwing. I first went to Kumho HS51, which was rough, boisterous, and rolled. GoodYear EagleF1 was loud and aggressive, but it was largely under control. At the end of the season, we'll evaluate wear. The typical annual mileage is 25,000 km.