OK, "seems" like it's an opportune moment to highlight how important accurate descriptions of tire size/construction (P-Metric, ISO-Metric, LT-Metric) and application (i.e. LC200 or LX570) are to determining correct RCTIP (Recommended Cold Tire Inflation Pressure).
Let's focus on a common tire dimension and see how construction and application affect RCTIP:
P-Metric P285/70R17 - LC200 = 27psi / LX570 = 26psi
LT-Metric LT285/70R17 - LC200 = 40psi / LX570 = 35psi
ISO-Metric 285/70R17 117T SL - LC200 = 32psi / LX570 = 29psi
So... if the only info I get is something like, "what's the pressure for 285/70R17?" I really don't know what to suggest - could be anything from 26psi - 40psi.
If you want a RCTIP for a P-Metric tire, please include the "P" in the tire description.
If you want a RCTIP for a LT-Metric tire, please include the "LT" in the tire description.
If you want a RCTIP for an ISO-Metric tire, please include the Load Index (e.g. 117) and whether the tire is Standard Load (SL) or Extra Load (XL or Reinforced).
Also, it is important to know whether you are using the tires on a LC200 or LX570.
I don't mind helping out with RCTIP recommendations, but please, give me the info I need to get you the correct answer.
HTH