Here are the specs: UHP 235/50R18 Considering the car's requirements, it's likely the ideal size. Compared to the stock el440 Turanza 215/55R18 tires, the performance is significantly better, and the Speedo is unaltered. You might get slightly better results with the real brand and maybe a grand touring tire. Climate is another factor. For the southwestern desert, I opted for Pirelli P Zero AS plus threes. As a general rule, the Michelin Pilot Sports are the best UHP tires to go for more extreme weather. The 235/50R18's are fantastic. It fits this car perfectly.Removed attachment.