Quote:
Originally Posted by CWtheMan
First, there is no rule stopping someone from using tires of the same size with a higher load capacity than the ones they are replacing, as long as they do not exceed the cold maximum pressure the rim is designed to support.
Tire durability is often confused with tire strength. Tires of the same physical size (ST225/75R15) provide the same load capacity at an equal inflation pressure. In other words, a LRD or LRE will provide 2540# of load capacity at 65 PSI.
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I agree completely. My thought (and understanding the last many decades) is that a higher ply rating ie: 10 ply vs 8 ply, also indicated a more robust construction of the tire which then enabled it to carry a higher pressure rating. Wouldn't that "robustness" then translate to a "stronger" tire in its construction regardless of tire pressure/weight rating??