As it turns out, the front tires on Snowball were somewhat bald, so I had to get them rotated. But dad also brought up that I should get new tires, and Greg needed the size to look for a slightly used pair. I had no idea your tire size is actually printed on the side of the tires.
Mine is P155/80R13 79S. Greg explained it with such ease, the first sequence of garbled numbers and letters mean something, but that's standard, and the size of the tire is in there near the end. I concentrated hard when he told me, but it doesn't actually make any sense.
I was thinking about bra sizes, and how guys complain that they're confusing. Well guess what gentlemen, C36 doesn't hold a candle to what's printed on my tires!