Check out the load ratings. Most P series tires have the same exact weight rating as D rated tires in the same size. If you can find the same tire, in the same size in both C rated LT's and P's, the P's are rated for heavier loads.
While the E rated tires beat P's, they are simply a waste of money on anything under a 3/4 ton.
I've also heard the argument that E rated tires are less likely to have flats even on light duty trucks and SUV's. I've run both and the number of flat tires has been exactly the same. My local tire dealer says he sees the same. Run over something that will let the air out of a P tire, and it will do the same to an E rated tire, and I'm convinced the P's are every bit as tough as a D rated LT tire.
Save yourself a lot of money and get a much better ride and stay with P rated tires.
