METHOD OF USING A TYRE

A tyre (1) includes a tread portion (2) including a ground contact surface (13), a first rubber layer (21) made of a first cap rubber forming part of the ground contact surface, a second rubber layer (22) made of a second cap rubber disposed radially inwardly of the first rubber layer, and at least one groove portion (5) opening to the ground contact surface. The first cap rubber has a loss tangent tanδ1, and the second cap rubber has a loss tangent tanδ2 greater than the loss tangent tanδ1. The groove portion includes a first indicator (15) in which a bottom of the groove portion locally raises, the first indicator having an outer surface (15o) in a tyre radial direction. The radially outer surface of the first indicator substantially coincides with a first wear line (16) that is parallel to the ground contact surface and passes through a radially outer surface (22o) of the second rubber layer.