Here's a link to the discussion:
recently purchased two tires at Discount Tire. Got home and looked at the date and they were 15 months old. I expected somewhere in the 6 month range. Returned to store and they researched other stores and all of them only had 2018 tires in stock in my size and specific brand. So the manager...
www.bobistheoilguy.com
Here's what I said then:
It is widely believed within the tire industry that properly stored 6 year old tires can be sold as new. I say "believed" because I know of no data that supports that position. HOWEVER, the company I worked for tested 3 year old tires from their warehouses (obviously properly stored!) and could not find any significant differences in performance. So I tell everyone who will listen - If you are concerned about the age of the new tires you are going to purchase, say so UP FRONT! I think it is just as deceptive to bring the issue up AFTER the tires are purchased as it is for the dealer to install tires that are old without informing the customer beforehand.