Do your wheels have a maximum PSI recommendation? The recommended PSI you posted, seems reasonable to me. They probably are using hooked-bead rims in their calculations, so I'd go with the max recommended if it is lower than the 80-85 you posted. Otherwise, the tires may blow off the rim. I like the idea of hookless on gravel and MTB but unless the suckers are really wide and using really wide road tubeless tires, I am not sure I want to run 70ish on the road with skinnier rims.