I must be missing something.
Some one posted a load inflation table from Sumitomo tires
The link is talking about their S tires and in the chart below the load inflation table it has the 719's specifically in that chart. Why would you think that the load inflation table does not apply to them?
It also states in the linked "book" as they called it under the section titled
Proper Tire Inflation
"Consult the air pressure guidelines in this book, or refer to the tire sidewall or pressure charts from the Tire and Rim Association. When
speeds are constantly above 70 m.p.h., it is recommended to use maximum air pressure for good wear and
performance."
Again perhaps I am missing something and very well may be, but it looks clear to me
