Wort des Tages
4 May 2026
run-flat
nounKfz-Technik
A pneumatic tire designed to resist the effects of deflation when punctured, and to allow the vehicle to continue to be driven (although usually at a reduced speed).
Warum dieses Wort
The point is not that it never goes flat, it is that the sidewall carries the car once the air is gone, so a blowout does not become a steering event. The distance and speed limits are the price, and drivers who ignore them cook the tire.
In use
It's a run-flat, so there's no spare in the boot; just get it to us before you've done fifty miles on it.
Written by our editors to show how the term is used, not a recorded quotation.