On the bellows where the nose of the drive presses against it...that is grease only...no adhesive.
There is also no way the bellows lifted from the lip by tilting the drive. The nose of the drive keeps it in place.
When was the last time you pulled the drive and checked for water in the bellows. bearing condition and drive alignment? You should be doing this annually or at least semi annually.
LOL...you are thinking about GY Marathons. GY Endurance was introduced late 2017 or early 2018 and are made in the USA.
Marathons used to be made in the USA but their quality went down once they started making them in China.
They are the best around. Best prices...free flat repair even if you didn't buy your tire there.
And I was wrong...they recommend replacing tires after 6 years and won't service them if they are older than 10.
They still have a finite life. Discount tire won't touch any that are over 6 years old.
For most applications, you can't find an auto tire that has enough load capacity especially considering you need to de-rate an auto tire for trailer application.
It's actually more than my opinion.
https://mechanicalelements.com/torsion-axles-in-tandem-or-triple/?srsltid=AfmBOooNR2MpPb5YZT3JaiTlqBP8YYkZm8w6gdmcn7URavNfw1KfUu2f
Synopsys of the article:
There is a good reason why torsion axles get their spindles bent frequently. When one wheel goes...