[scales]

I was informed by the Gentleman who did my front end alignment,Allen Lemons, to change tires every four years whether they needed them or not. He learned this lesson when a fellow Street Rodder blew what appeared to be a good tire and wrecked his Street Rod.
I changed the tires on the Mustang as soon as I noticed the cracking hiding in between the tread. This is the first I've heard of a date code.

Marty.