Sailun S637 on 3200lb Capacity Wheels

I run my Sailun tires at 95-100 psi., but that's 15-20 psi over your wheel rating. Personally I wouldn't run mine at less than 95 psi. And I don't know that I'd feel comfortable running my wheels at 25 percent more pressure than rated capacity. Who told you you could run 95-100 psi. with those wheels? If it was the dealer, make sure you get that in writing.

The sidewalls are really stiff and running at 85 psi. might not be an issue, but I'm not a tire engineer and can't really say.