Quote:
Originally Posted by BlaiseKnoll
I like your thinking, and will go that route. Also going to replace all trailer kings with Sailun's, part of the "long story".
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If those Trailer Kings are the OEM tires, they are "aged out" x 3 !!!!!
All ST tires "age out" rather than "wear out". There is a small oval molded into the tire sidewall, probably near the load capacity/max pressure information. That oval will have 4 numbers molded inside it. Those numbers relate to the week/year the tire was manufactured. As an example, 3512 would indicate tires manufactured in the 35th week of 2013.
The reason tires "age out" is that the polyester or nylon cording used in the sidewalls gets hot when towing or sitting in the sunlight. That heat causes the fabric to weaken and over time, reduces the sidewall strength of the tire. If you "lose enough strength" then you end up with a "big boom" usually at the most critical time, when you need the most tire sidewall strength.
So, check the date on the tires, if they're more than 5 years old, you're definitely ready for new trailer tires. Sailun S637 has become a very popular "heavy RV tire" by many owners.
As a side note, Discount Tire recommends replacing all automotive tires at six years and has stopped servicing tires that have a manufacture date older than 10 years, they won't touch the tire except to replace it.