Many thoughts to convey on many subjects, so this is going to seem kind of disjointed:
From what I have seen, LT tires are so labeled even by European manufacturers. Those are labeled with "Load Ranges", although I think you will find the term "Ply Rating" somewhere on the sidewall.
There is a type of tire from Europe that kind of fits with the LT tires, but they include the letter "C" after the size (for Commercial). Those come in "Ply Ratings", although I think the preference in Europe is to use Load Index. The Goodyear Cargo G26 is a good example. What is interesting is that Tire Rack indicates these as having a Load Range, and I wonder if they are dual marked, because the European standard from which these derive doesn't use PR or LR - they use Load Index.
pnichols wrote:
..... "This road still exists, as a primitive Forest Service road suitable for 4-wheel drive only with 10-ply tires recommended........"
I've seen a photo of a sign (but couldn't locate it again for this post) alongside a road to a remote campsite where tires of at least 10-ply were recommended. I think the general public thinks that higher ply rating gets you a tougher tire.
.........
Thanks for that.
Yup, that doesn't quite line up from a purely technical point of view, but I am sure those recommendations were made based on the fallacy that more plies = more rugged. Certainly, the sign makers didn't consult with the tire manufacturers.
*****************
And lastly, Roger (Tireman9) and I are both retired from different tire manufacturers, and although our paths have crossed on many occasions, we have never actually met.