Interesting formula CF, we are relegated to 26" wheels, run narrow as we can get, 26 to 28mm, formula says 85 for us, a 260 lb team. We tend to run 90-95 psi. Started out three years ago, more at 105-115 psi , and interestingly enough, we had more flats. Sure seems to perform better at higher psi, but our roads are terrible, so we both enjoy the softer ride.
R&J