I was trying to get some work done and the kid was pestering me: “Show me some pictures on the computer, Daddy.” So went to Google Image Search, and said “What would you like to see a picture of?” “Ummm... a tire.” No idea where that came from, but easy enough. We looked at a couple of pictures of tires, and as a side-effect I found out How to read a modern Passenger Car Tire Sidewall. Some committee somewhere obviously invested serious time in working this one out.
