I just purchased a new 2025 Jay Feather 21MML trailer. I questioned the dealer why the trailer has Rainier ST tires instead of Goodyear tires. They didn’t know so they put me in touch with a Jayco sales representative. He informed me Jayco changed to Rainier ST tires because Goodyear tires were becoming too expensive. Boy did that surprise me since Jayco brags on their website that they use Goodyear tires because of safety and reliability. I for one would have rather had the option which tires to be installed on my trailer even if it would have cost more. I guess us RVer’s will be Jayco’s guinea pigs to test out this brand of tires.