Forum Discussion
phillyg
Mar 20, 2016Explorer II
Seems that most tires now carry a designation of the number of plies, for example, 10 ply, but they add the word "rating," which allows a tire to be manufactured with less than 10 plies but still be the equivalent of 10 plies. Ahhhh, the magic of advertising. Generally, 10 ply is E and less than 10 ply is D, and so on. Wheel manufacturers apparently don't have standards so their PSI stamp can be anywhere on the wheel, even under the tire, and they may not use PSI, rather they'll state the max load rating, for example, 3400lbs., which would equate to a 110psi, or E tire.
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