Originally Posted by Badger6

That spec is somewhere between a guess and wish.

Use this calculator [link removed, not allowed for new poster] to get the right pressure for any width tire, as measured.

And, wider is more comfortable, because wider means more volume, and can be run at lower pressures which means the carcass can flex a bit more. 25s won't be plush, but they'll be slightly more compliant than 23s.