I had 3 marathons fail, 2 catastrophically, within the 2-3yr time frame after the stamped date. All were properly inflated, two went without notice, one was noticeable that the tread was separating. Luckily both times barely did any damage. Get some LRG tires and don't worry about it anymore. This most recent trip was the most enjoyable driving trip I've had in a year (since the tires started failing). Quit worrying and upgrade! I know I'm glad I did.
Thank you for your service. My father is also a retired submariner.
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