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Old 07-04-2016, 10:33 AM   #15
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Originally Posted by Howard L. View Post
Frank, what year tires did you have that failed. There were a number of the mid 2000s era ST tires that did have problems. GYMs were among trailer tires that had a number of failures then. I thought, however that from approx 2010 and later those ST problems had been corrected. In fact I wonder if any one has real data that covers ST tire reliability for the last 5 years or so.
They were 2012 tires on a 2013 - 30' International.
The tires sat around over a year somewhere before being installed.
Looking at how my new Michelin LT tires behave on the trailer and also on my TV I believe the ST tires are obsolete. Non ST Radial tire sidewall flexing is far more demanding than what an ST tire sidewall is subjected to. The way an ST tire has to be made is why they are prone to thread separation. They should stop making them and the old regulation be eliminated. Let the market place competition provide the best product.
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Old 07-05-2016, 09:14 AM   #16
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When parking, you are moving so slow that the stress on tires is probably minimal.
There is stress on car tires in tight turns.
All tires leave nice black streaks in tight turns.
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Old 07-05-2016, 11:33 AM   #17
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Seems to me that Frank has the logical answer. With very stiff ST sidewalls, turning moments put much of the load on the treads thus the treads are more likely to get scuffed loose. With LT and P tires, having more flexible sidewalls, the turning moment shared by the sidewall and the tread.

The counterpoint may be that stiff sidewall reduce sway?
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Old 07-05-2016, 02:42 PM   #18
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No perceivable difference in sway from ST tires to LT tires on my trailer-


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Old 07-06-2016, 11:05 AM   #19
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No perceivable difference in sway from ST tires to LT tires on my trailer-


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That is exactly my experience. I run my LT tires at 52 psi on our 30' International. But the ride is much smoother .
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Old 07-06-2016, 12:35 PM   #20
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Yes. Things on the table or counter stay there with the LT tires.
When you get there, things in general are where you put them/haven't moved.
A 10-ply truck tire still has a plenty stiff sidewall.
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