run-flat

[ ruhn-flat ]
/ ˈrʌnˌflæt /

adjective

(of an automobile tire) constructed so as not to deflate completely after a puncture so that a motorist can still drive the vehicle for some distance.

Origin of run-flat

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019