Recently just change my myvi 175/65/14 up size to Yokohama es32 185/60/14  .

While maintenaning the same recommended tyre inflation pressure stated near the door frame (31psi), the new tyres seems appear "under-inflated" compared to my previous tyre. Is it Yokohama rubber is softer than my previous set ecopia200?

Should I increase the inflation pressure futther since the tyre width is change d from 175 to 185?

How much should I increase though the 31psi recommended tyre inflation pressure is set for some reason.........