A “slow” leak that causes tire failures in steel cased tires almost always results in sidewall failure rather than the commonly called “blowout” in the tread area. Such sidewall failures with steel cased tires are referred to as “zipper ruptures”. Sometimes before the tire fails smallish broken steel strands in the sidewall can be seen or felt protruding through the sidewall rubber.
On the other hand, overloaded steel cased tires will normally suffer tread separations very similar to fiber corded carcasses. However, they will not normally blow until part or all of the tread area has left the carcass. A blowout before that happens may be caused by foreign object damage.
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A RV trailer tire poster
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