Originally Posted by latitud
Did your truck come with a Load Range specific tire? 44 psi sounds like a Load Range D tire. 35 psi is common for non Load Range rated tires, meaning just plain ole 'P' or non 'P' tires. One thing to make sure of is that if your truck came from the factory with Load Range 'D' or Load Range 'E' tires (like 2500 and 3500); then never substitute a lower tire. There are many times that accidents will be blamed on improper equipment, meaning tires rated too low for the vehicle they are on. Just be safe...and 35 psi is a good pressure to run at IMO.
Its only a half ton. The door placard lists the tire size as P245/70/17. The build sheet says the truck left the plant with P265/70/17, and thats the size that was on there when I bought the truck, so IDK maybe someone at Dodge got mixed up with that or something.
A few calculations on the P rated tires I put on there. If I am mistaken in any of these calculations, someone correct me.
The tires are rated for 2833 pounds a piece. So 2833x4= 11,332 pounds
Have to - 10% because its a truck. Dont know why, just what i have always heard but whatever. So 11,332-10%= 10,198 pounds
Ive never had my truck weighed but did research a bit and found that a 4 wheel drive similarly equipped as my 2 wheel drive weighs 5,000 pounds. So I assume that I am a bit lighter, but Ill use the excess to widen the safety margin.
So, 10,198-5000= 5198 pounds left for payload.
Now being that most payload will be in the back of the truck, divide that number in half, 5198/ 2= 2599 pounds remaining.
I couldnt imagine hauling 2599 pounds in the back of my truck, period. I am almost sure that that is way beyond the weight capabilities of the truck, making the more expensive rough riding LT tires downright silly, especially since the truck came with P rated tires rated at a lower capacity. The most I have ever hauled in the bed of a truck at one time was maybe 500-600 pounds, and I have a max tongue weight of 500 pounds on my hitch so towing checks out too.
I feel when deciding on these I have gave myself a very broad margin in the calculations and still havea lot left over. If I am mistaken in any of my calculations, I hope someone does correct me.