The pin weight of our 36TK3 is 4380 for a total weight on the rear axle of the truck of 7940 as weighed. Michelin recommends 50 psi for LT235/85R16E to carry 8024 with duals.
The trailer axles are 13380 pounds or 3345 per tire. According to Goodyear 90 psi is recommended for 3695 pounds with H tires.
I run 10 psi over the recommendations to help reduce tire temp but much more and ride really suffers.
http://www.michelintruck.com/micheli...ion-tables.jsp