|pezón nm||AmL (saliente) (UK)||tread n|
|Esas ruedas están tan viejas que ya casi se perdió el pezón.|
|Those tires are so old they have almost lost tread.|
Is "thread" that common; I can't find any references?
Also, in the Sentence, "tires" is used with the American spelling, but "tread", supposedly only used in British English, is used.