rbpru wrote:
While I cannot comment on tire compounds and construction, I can say that the primary reason the RV and Tire industries recommended ST tires is their stiffer side walls and the rolling resistance of their tread design. These characteristics and a recommended speed rating of 65 mph are what the industries feel is proper.
If a person feels they are wrong or these features are less important than those found in LT tires, so be it.
There are not enough LT tire in trailer use to draw any meaningful conclusions of performance, when compared to the millions of ST tires placed into trailer service every year.
Hello rbpru, perhaps you have had your particular ST tires off the wheels and compared them side by side to a LT of the same size ? Perhaps you found in your case, the ST tire to have a stiffer sidewall ? If so, that's great. And if so, I would love to hear what brands of ST and LT you were comparing. It would add some facts to the dialog.
In my case, my camper came with "Freestar" branded ST tires. When I took them off to replace them with Kumho 857, I used my hands to "flex and feel the sidewalls". In my case, I found the opposite to be true: the Kumho is much stiffer in the sidewall compared to the very flexy Freestar.
So please give us some feedback on the tires you have personally compared. Thanks.
ps, as an aside, the old Freestars I took off are still in use on two trailers that belong to friends. Both are small open utility trailers, one is used to take a riding mower around town, the other trailer is used to go to the dump once a month or so. These ST tires are working fine for these guys in slow speed, short distance trips.