I weigh 180 (normally 172, but winter ) and I ride 25c at 95 psi front, 105 rear. You can probably ride 90/100 or 85/95 without suffering pinch flats or significantly increasing rolling resistance.

If you go to a 23mm tire, the decreased air volume would necessitate more air pressure.


There's a lot of information here on BF so just search if you want more details including math formulas that prove out these baseline numbers.