I have two year old 205VR14 Michelin XWXs on my 365 GTC and would appreciate comments from 330/365 GTC owners on tire pressures. The 330 GTC Owners Manual shows the following for Dunlaps of the same size as the XWXs: <110 mph = F29/R33 >110 mph = F33/R37 >135 mph = F38/R42 The 365 GTC Addendum to the 330 GTC manual shows: <124 mph = F27/R31 >124 mph = F31/R37 Interesting that the manuals show a 4-6 PSI differential front/rear even though the weight is near balanced 50/50. I don't have an educated enough butt to discern much seat of the pants differences in the tire pressures I have tried other than 38/38 is waayyy to high. I started out with those pressures on a drive from Maryland to Watkins Glen, New York in September 2018 based on the recommendation from a Ferrari tech and had one of the scariest drives of my life. The car felt like it wanted to swap ends in sweepers (~80 mph) on the Interstates. I'm guessing the pressures had increased to the low 40s PSI at the 80 mph Interstate speeds and the warm air temperatures (mid 80s). Last weekend I used 30/32 on a 200 mile group drive with my local Ferrari club. A friend with many track sessions in a variety of cars was driving my GTC and said it was understeering, which I guess is not surprising. I don't drive the GTC aggressively, nor have I done any track sessions with it but might, understanding that would require different tire pressures. I am looking for suggestions for normal street driving with an occasional blast to 95-100 mph and some fun in corners but nothing extreme. I appreciate your comments and suggestions.