I'm attaching a little guide to the warranty on the GY Endurance. It does say 6 years but there's not any way I'm running a set of trailer tires on a large trailer for 6 years....or 5 etc. 3-4 probably. No more than trailer tires cost I would never try to get a warranty replacement; fight with a tire dealer etc. Read the stuff on the warranty that would worry me; cracks, cosmetic cracks etc. .....and then THEY will be the ones to decide if the tire, and you're time and effort was worth a new tire, for like $175....maybe? In todays prices it costs me almost that much to drive to a dealer to initiate something like that. Never used a tire warranty and doubt I ever will.
https://www.goodyear.com/content/dam...012%20page.pdf