Quote:
Originally Posted by brucepick
My guess is that a bad valve stem was the cause.
Valve leaked causing tire to lose pressure.
Pressure loss causes temperature rise which causes heat built up due to expansion of air in tire. This causes increased pressure - until the rubber fails, then you lose the pressure.
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I'll have to agree with the assessment. Heat is generated from underinflation. BTW, was the tire inflated to 50 psi cold? I'm sure you know about the speed/heat/increase in pressure process after highway speeds -- could have increased pressure unknowingly and put pressure on the stem creating a leak.
Sorry to hear about the failure...
RH77