( BrE ) ( NAmE tire ) / ˈtaɪə(r); NAmE / noun
a thick rubber ring that fits around the edge of a wheel of a car, bicycle, etc. :
a front tyre
a back / rear tyre
to pump up a tyre
a flat / burst / punctured tyre
bald / worn tyres
—picture at bicycle , convertible
—see also spare tyre
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WORD ORIGIN
late 15th cent. (denoting the curved pieces of iron plate which went around the carriage wheels): perhaps a variant of archaic tire , shortening of attire (because the tyre was the “clothing” of the wheel).