Tire Service Life

[lfalzarano]

I heard/read in the past that tires get old and should be replaced after 5 years. I'm facing that costly project this year and did some more research. I have the Goodyear GS-D3's with plenty of tread and no wear, damage or cracking. Internet research found a TireRack article on the topic. It also includes several other tire manufacturer's recommendations.

https://www.tirerack.com/tires/tiret...jsp?techid=267

Basically, Goodyear's latest bulletin from December 8, 2011 says,

"Tires are designed and built to provide many thousands of miles/kilometers of excellent service.

Tires are removed from service for reasons such as: (1) the tread wears out (down to 2/32nds of an inch) (2) road hazards damage the tire (3) the tire is run underinflated or overloaded and is damaged (4) consumer’s choice or personal preference.

Tire materials (including rubber) have performance properties essential to the proper functioning of the tire itself. These properties evolve as a function of time, service and storage conditions: it is a physical property of rubber that it changes with time. However, for each individual tire, the degree and amount of change is affected by many elements such as temperature, storage conditions, and conditions of use (load, speed, inflation pressure, impacts with potholes, etc.) to which the tire is subjected throughout its life. Since service and storage conditions vary widely, accurately predicting the serviceable life of any individual tire in terms of years and/or months is not possible."

So, if I don't have the above mentioned tire issues as described, should I refrain from replacing them until they exhibit those signs?