This article may very well shed some light on the similar experiences travel trailer owners have had with the Goodyear Marathon tires, as the Class A crowd has had with the Goodyear G159. With failure rates "unheard of for consumer products", that is "10 to 27 times worse than the Firestone tires deemed defective by NHTSA). It's no wonder ST tires have gotten a bad name.
It looks like Goodyear Marathons tires were designed and built just about the same time as the G159s. From the article, it's obvious that Goodyear culture and policies at the time were hardly focused on building a premium tire. With build standards that barely meet requirements. And their only concern being market share and profit.
It's a great, but if not sad read on cooperate greed. Makes me never want to touch a Goodyear product again -
https://jalopnik.com/how-goodyear-hi...his-1822200424