For years Goodyear Marathons have had reliability issues as evident of 200-300 Marathon tire complaints on NHTSA.gov website. The issues you had are typical for this tire and have been since they hit the streets in the late '60s/'70s.
Goodyears new Endurance ST tire replaces the Marathons. They have been out for just over a year and seem popular however its going to be several years and 25k-35k miles of service to see how reliable they are.
Carlisle HD is another new gen ST tire and like the Endurance is popular but has no long track record.
Provider is another new gen M speed rated ST tire and has been on the market since the '10-'11 era with a excellent reliability record.
The above tires have the nylon cap under the tread which helps hold the tire together.
Maxxis ST are a bit dated. There still 65 mph speed rated and all sizes don't have the nylon cap. Maxxis 14" sizes don't have the cap.
With over 30 members reporting Maxxis ST8008 tire issues I would go with a better tire.
Maxxis does have a all position U-168 LT tire in several 14" sizes/C and D load ranges.
And the long time popular Kumho 857 comes in 14" D load range at 65 psi
The rest of the ST trailers tire brand herd ??? Not on my trailers.
