What size are the g rated tires on toy haulers

fj12ryder wrote:

taken wrote:
The Sailun's were actually LT rated until a couple years ago. LT tires have a higher import tax than ST so Sailun kept the tires the same but changed the designation to ST.

I bought the Sailun when they were designated as LT tires, and their weight rating was 3750 lbs.

Yes I have LT rated stamped tires as well. I have been told they are the exact same tire as the ST version which I don't dispute.
However now the load rating has increased to 4000+#on the ST stamped tires. How or why did the rating change if it is the same tire?