All I could afford wrote:
Westlake
Interesting......
Those are from the highly regarded Hangzhou Zhongce Rubber Company LOL, equal to maybe Michelin I assume, but they do not list any ST trailer tires anywhere. For a good laugh go to that site and click on the contact us or find a dealer links.
Westlake ST tires are distributed by Lionshead Tire and Wheel out of Goshen IN exclusivly, possibly or probably made by the above mentioned Chinese maker for Lionshead.
Lionshead however is listed as the manufacturer at NHTSA.
Now I have to go get the plant code from the DOT number off our Rockwood out of curiosity .
As far as the ST / LT debate I'll stick to the advice given to me a few years ago from a retired Goodyear engineer. LT tires are not made for the sidewall loading that a trailer tire is subjected to when you do a sharp turn with multiple axles. That advice has served us well.
I run ST's on a small fleet of equipment / tool trailers and would not consider anything else. Out of 6 to as many as 10 of those trailers on the road at a given time over 15 years, I think we may have had 10 or 12 flats in at least a half a million miles. That's saying a lot with some of the dummies we have pulling those things around at times, good help is hard to find. Every one was due to picking up a nail or screw at a site or some other type of damage we brought on ourselves. When we need tires on those trailers they go down to the local tire guy and he puts on whatever ST's he has in stock, usually imported I would Imagine. I don't waste time monitoring what they are as I am not afflicted with RVFOCTD (RV forum obsessive compulsive tire disorder). I do know we have some Carlisles on two trailers right now, that I personally towed to a site last week.