Quote:
Originally Posted by Piotrsko
Why is it unreliable other than the limits of the thermal scan accuracy? I axle weighed the F250, this was the result unloaded. When it's loaded the pressures increase on the rear, but not much on the front, the result of weighing the axles loaded.
|
It's unreliable because it assumes that even loading/even pressure distribution/even wear is what the tire was designed to do. As a tire engineer, I've designed tires to purposely wear unevenly when loaded per the load charts in order to improve rolling resistance.
Second, it is also possible to design a tire that has good contact for a large range of loadings/inflation pressures. In that case, it would be hard to determine what the optimum inflation pressure would be. I certainly would expect a layman to be satisfied long before he actually gets the optimum value.