Back when I first won the auction for Miata #6 I wondered if it was on the original tires. In the auction notes the tires it is said to have are the same name and size as original equipment tires, but they could be replacements. I asked the folks who have the car to tell me what the date codes are on the tires. Well, it dawned on me that they usually have tire photos in the gallery that show the date code.
I knew about date codes and even looked up what it was a long time ago, but because I never used that knowledge, I forgot it. I had to look it up again:
For tires made since the year 2000, the tire date code is always the last four numbers in the series. The first two digits represent the week of the year the tires were made, and the last two digits indicate the year.
Those tires all have the date code of 3200, or the 32nd week of the year 2000. That’s about 1,280 weeks ago. A long long time ago.