flat tire
US /flæt ˈtaɪər/
UK /flæt ˈtaɪər/

1.
a pneumatic tire that has lost some or all of its air, typically as a result of a puncture or leak
:
•
I got a flat tire on the way to work.
•
We need to fix this flat tire before we can drive.
a pneumatic tire that has lost some or all of its air, typically as a result of a puncture or leak