Originally Posted by Lascauxcaveman

There is a lot of variation in tires and rims that are all supposedly the 'same' size. The size marked is approximate; and in some cases, very approximate. I've gone up to 80psi on some hookless rims, but that is with 'some' tires. If they fit loosely, just be careful and run lower pressures. Or find tighter fitting tires.