Wheel cover (4)

I think it could be either:

Which length description are you looking for?:

3-3

tyre

(Other definitions for tyre that I've seen before include "Rubber wheel-cover" , "Wheel-hoop" , "Wheel's rubber tube" , "Rubber tube on a wheel" , "Rubber ring on a wheel" .)

I've seen this clue in The Mirror.

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