Mate if you asking if the thickness of the tyre or the size "ie: 205" effects the pressure then the answer is no..... psi is set at standards, as listed above, regardless of the size of your tyre. Example, wether you have psi 32 in a 21 inch tyre or psi 32 in a 16 inch tyre, doesnt make a difference, just means more air, but doesnt effect what your psi should be ... if you can make sense of what im getting at.