Goodyear

I was just about to enter I-26 South Bound from South Carolina heading back to Florida. An Active Duty Army Sergeant stopped us at a Shell Station before entering the Interstate and informed us that there was a bulge on the inside of my 2017 International Serenity 19 Ft Airstream. Here is a picture of what he saw. Thank Goodness he flagged us down and we changed the tire before coming back to Florida. My question is what could have caused this to happen? It is a GYE ST 225/75R15. I have tried to attach a picture of the tire.

Now I believe I have a suspected tread separation and want to have the entire set (3 Includes the Spare Tire) ST225/75R15 Endurance replaced.

I would like to have a design engineer see the defective tire to determine if in fact it is a tire separation and Defective Tire. I am concerned that it would be safe to put ST225/75R15 back on my airstream. The tire has a date stamp of 4516.

https://www.airforums.com/forums/attachment.php?attachmentid=399430&d=1626216729

https://www.airforums.com/forums/attachment.php?attachmentid=399156&d=1625864407

https://www.airforums.com/forums/attachment.php?attachmentid=399431&d=1626216729

https://www.airforums.com/forums/attachment.php?attachmentid=399432&d=1626216729

Single Axle GVWR = 4500 lbs
The Factory Weight of trailer is 3938 lbs
The Max Cargo Weight is 562