I need new Tires

I am of the opinion that to many people change out perfectly good tires because of a name. I am not sure if we are just getting lazy and dont want to include tires as part of out trailer pretrip or what. ST stires or maybe any tire, but the show I was listining to said even the chinese tires have a life expextency of 6 to 9 years. I was looking at the tires on my 5th two weeks ago gtting ready for a trip and I noticed some weird wear on that one and then I noticed the teltale sidewall dimples of a tire starting to seperate. so I checked all the rest, no cracks in between the tread or anywhere else so I just changed the one. now this tire was on the trailer when I bought it new in 2016 so probably 5 years old and just one of the defects. my last trailer I went 10 years on the tires before I changed them out with no issues. the trailer before I went 8 years then traded it in. they were all "china bombs"
so even with the "off shore tires" if you include the tires in your daily checks, looking for cracks on the sidewall , inbetween the treads and keep the cold psi proper, you can probably get the max life out of them with out any other dammage.

would I like to buy sailun tires you bed, but they are pricy up here but not crazy. but I think the reason I would be buying them is for reduced rolling resistance and better tread life.

Steve