jcarlyle wrote:

Now this assumes that you stick with using ST tires on your trailer.
According to my research, ST rated tires are optimized for load
carrying, and an ST tire of given dimensions will carry more load
while running cooler than an LT or a P rated tire of the same
dimensions. Running cool is the key to tire longevity and preventing
blowouts and tread separation.

Trailer tires (ST designation) don't necessarily run cooler that LT or P
rated tires. Their optimization tends towards longer life (years, not
miles) because they typically aren't used as much or as often as car or
truck tires. They are not optimized for speed, and the load rating has
to be derated over about 65 mph.

My experience with ST tires recently led to me use LT tires instead, but
with a speed rating well above (say, 20 mph) my towing speed. The speed
rating ensures the tread has good lateral stiffness for stable towing
and plenty of margin to avoid tread separation.

--
Eric Greenwell - Washington State, USA
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