Personal psi / tyre pressure choices

Wouldnt having wider rims give more inner volume , so youd need more psi ?

i remember a thread on here about the A23's needing more psi because of the increased volume.
Thanks John. Reckon you're right. Wanted to get some ideas first, but I'll have a play around. Regarding volume and psi, I think it's a case of more air but less psi.