[BB_TX]

I tend to believe the tire manufacturers and tire dealers publish load vs inflation charts because of their expertise, not just something to pass the time. While inflating to the max stated pressure is certainly better than being under inflated, max pressure probably most often falls in the category of over inflated.

Tire manufacturers and dealers information are typically fairly consistent in the following statements;
Under inflation will cause tire over heating
Under inflation will cause increased edge wear
Over inflation will cause a harsher ride
Over inflation will cause increased center wear
Over inflation will cause a harder tire making it more prone to damage and puncture due to impact
Correct inflation for the load provides more even contact to the road across the width of the tread meaning best traction also meaning better braking

If weights are not known then max is the safe way to go. And easiest. If individual weights are known, then it is generally recommended to inflate all tires to the pressure (or slightly higher) recommended for the tire carrying the most weight.