Originally Posted by SteveSueMac
I'm not sure I understand. Let's say the D is 65 psi max and the E is 80 psi max. If you increased capacity from D to E, would you recommend the E rated tire also be inflated to 65 psi? I thought the idea was for tires on the trailer (whether ST, LT or P) to be inflated to their max. Though I could certainly have that wrong...
But if I move from an ST225/75R15 Load range E to an ST235/80R16 Load Range D, the load carrying capacity increases from 2830# to 3000#, but the inflation pressure goes down from 80 psi to 65 psi, so the ride quality goes up.