Should I Run Lower PSI In My Trailer Tires When Towing An Empty Trailer With My 1993 Jeep YJ

Expert Reply:

You always want to have the tires on your trailer inflated to the maximum tire pressure as specified on the tire. If you run the trailer tires at a lower PSI, the thicker sidewall of the trailer tires would cause the tires to heat up quicker and would reduce the life of the tires.

I have linked an FAQ on trailer tires that you may find as a useful reference.