Rubber is just organic material that ages like any other organic material
and has a shelf life...rubber is just ('highly processed' with other
'ingredients') juice from the rubber tree...have heard it referenced
as 'The Milk' from a rubber tree
"Perishable" is the 'new' thought in reference to tires now...
As another mentioned...there is a whole set of metrics that has been
known for a looooooooooong time in dealing with 'perishables'...
FIFO, but more than that now that the government is noodling it...lobbyists
will make tons of money, but at the end of the day...think/hope there
will be new rules for tires age management...guessing as a min...storage
environment specifications coming down the pipe. Max/min temps, humidity, etc
For that is the 'product' of tire OEMs...but and again...bean counters
will try to dodge this at all costs...
Worked many side jobs while in college and tire monkey was one. Learned
a ton from the manager/owner. 'HE' would understand and take measures
to manage tires as perishables. He managed his product (which included
services) and guess what...his bottom line came along well...as folks
in the area knew he was a straight shooter. Even other shops sent
their troubles our way and where I learned the most from him
Never had tires last that long, but now that the Suburban is a weekend
vehicle...must noodle how I'll manage...guessing just have to check
their date code and put it in my smart phone calendar to start checking
at some future date...