I'm looking for a little help here since I have not run anything lower than 50 series on my Stang. I have a Jaguar I am upgrading to 18,19,or20's. The 18's will fit 45 series but the 19 and 20's need a 255-35 to fit. How do these tires ride on rough roads? I see alot of people running these low profile tire but i don't want to mess up the ride of the jag to much. Thanks in advance.