There is a benefit to upgrading tire load capacity at replacement time .
Travel trailers are made to a price point and each component needs to cost the manufacturer the minimum amount .
As regards tires the first time purchaser has no idea that the ST tires are made to a minimum standard that assumes that the trailer will sit 99 % of the time .
Further it is a too frequent occurrence that the trailer sits without moving after the 3rd or 4th year .
Not everybody is RV crazy like the posters on this board .
So the minimum tire goes on as OEM and the purchaser does not know or care .
Rather the question is the interior suitable to the missus and does theslide out add huge room .
After actual practice we see ST tires fail considerably more frequently than our car and truck tires have failure .
Most folks never have a tire failure on a car or truck and it never enters their mind that ST tires fail in the 21st century .
The first time we consider upgrading is too often AFTER the first ST tire failure .
Attendees on this forum have the opportunity to upgrade BEFORE the first failure .
In the long run it is cheaper to upgrade to an LT tire at a modest premium to an ST tire rather than having to repair / replace the weaker ST tires a second and third time .
Plus when I want to go camping , I want to go camping , and not spend time on a roadside on a hot sunny day .
Please upgrade at replacement time and save yourself some grief .
One time arriving at your camp spot to find somebody else has taken it because you were fixing a blowout is another consideration .