"flat tire"

[Dave Wilton]

> Is there any dictionary out there that includes a definition for
> "flat tire" as in when someone steps on the back of one's
> shoe causing one's heel to come out?  I couldn't find it in
> HDAS, it doesn't show up in the ADS archives, and the
> earliest I could find in nexis (searching for "flat tire" with shoe
> and heel) is in the Atlanta Journal & Constitution 7/15/93.
> Isn't the expression older than that?  Does any dictionary
> record it?

I haven't seen it in any dictionaries either, but we called them "flat
tires" when I was in elementary school, c. 1970.