A friend suggested it might have been a bad wheel spacer. Those tires do look like they were sitting wider then factory wheels would sit so maybe a defective after market wheel that failed?

65 Coronet 500 convertible
69 Fury convertible
69 Roadrunner
75 Scamp
14 Ram 1500
18 Jeep Cherokee
www.69roadrunner.net www.plymouthbulletin.com