I've got to say that, in my experience, PSI is irrelevant to any "rubbing". I've run 205/65-16 size for several hundred thousand miles. The ONLY rubbing has been the nut cage. I run 26psi all the time. This has been on all three Valks at my house.
Agreed, PSI may not make any difference with the fender, I can't say, because I did the nut cage on both my Tourers and my Interstate when I installed the first Dark Side on them.
Is the OP riding a Standard?
It may make a diff in the swingarm clearance. Tire brand could make a diff also, maybe.
26psi is on the low side, so if you didn't/don't have an issue, most others would probably not either.