Cotsco really sells Kirkland tires.
The Michelins and Bridgestones you buy at Costco are not the same as you would get from Tire Rack. I know.
I had a non-repairable puncture on my tow truck. Cotsco could not match it with an in stock tire. They checked the whole world for me.
At that point I called a friend at Michelin. He said they always do special runs for Cotsco. The construction and rubber compounds are different from their usual run. The tire I need is scheduled for production the end of this month. They'll run off a quarter-million tires in my size.
Meantime ......
Richard Newton
Tools for Your Tires