n[C]tread[
Date: 1700-1800;
Origin: tire
'metal plates around a cart wheel' (15-19 centuries), probably from tire
'equipment' (14-18 centuries), from attire;
ATTIRE]
a thick rubber ring that fits around the wheel of a car, bicycle etc
I had a flat tyre (=all the air went out of it) on the way home. The spare tyre 's in the boot.front/rear/back tyre a punctured front tyre