Stock tires a P-rated which usually have a max inflation pressure of 44psi. The LT rated tires have max pressures of 60 and 80 for D and E load ranges respectively. Regardless of which tire we're running, you shouldn't ever have a D or E load range tire run at max pressure on these vehicles.

I put a write up in the How To section to help people determine pressures for non-stock tires. Its actually dangerous to run over inflated tires..... its not just a harsher ride.