I'm a 6'6" 230lb rider on a Domane with GP4000SII tires. I've been running 100psi front and rear for the longest time and recently tried 90f/95r and it felt fine. On my CX bike, I just got the 28c version of the same tires for my road wheelset (CX bike doubles as winter road bike). What would be a good starting PSI for these? 70/70? 80/80?