In the us all tires have a number stamped in the rubber that indicates the year and week of manufacture. This has been there for a very long time. I'm sure th

In the us all tires have a number stamped in the rubber that indicates the year and week of manufacture. This has been there for a very long time. I'm sure the idea was efficient inventory management more than anything (easier to read without unstacking tires.). Pressure (TPMS) is a very different active device. They're battery powered and the batteries need to be replaced after some time.