Forum Discussion
jmtandem
Sep 11, 2016Explorer II
I put 35K miles on the ST tires (OEM TowMax - a cheap Chinese tire) on my old trailer before replacing them. I replaced them even though they still had about half their tread depth left because they were 7 years old (from date code) and I didn't want to push my luck. Both ST and LT tires dry rot and should be replaced at 6-7 years.
If the tires are used within their rated limits (not overloaded, not driven over rated speed) and if the trailer doesn't have axle issues (bad alignment or the like) and is towed level ST tires will last just fine.
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