| CPC B60C 13/001 (2013.01) | 19 Claims |
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1. A tire comprising a pair of sidewall portions, wherein
an outer surface of at least one of the sidewall portions includes at least one concave mark recessed from a reference surface,
the or each concave mark includes a bottom surface and an inner wall surface extending in a depth direction of the or each concave mark to surround the bottom surface,
the bottom surface includes a peripheral region extending along a contour of the or each concave mark and a main region surrounded by the peripheral region,
the peripheral region includes a shadow region and a non-shadow region,
the shadow region is a region where a shadow of the inner wall surface is formed when light is assumed to be shed to the or each concave mark from a first direction,
the non-shadow region is a region where the shadow of the inner wall surface is not formed when light is assumed to be shed to the or each concave mark from the first direction,
each of the shadow region and the non-shadow region is formed with an uneven surface provided with a plurality of minute protuberances,
a width (W2) of the uneven surface of the non-shadow region measured in a direction perpendicular to the contour is smaller than a width (W1) of the uneven surface of the shadow region measured in a direction perpendicular to the contour,
each of the minute protuberances has a conical shape with a rounded apex and a circular contour in a front view of the or each concave mark,
the apex is provided with a minute recess,
in a cross-sectional view of each of the minute protuberances passing all through an axis of the conical shape, the apex has a profile in which two arcs each extend upward in a convex shape, are arranged side by side, and connect with each other, wherein a connection portion of the two arcs forms the minute recess.
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