PNEUMATIC TIRE

摘要

A pneumatic tire (1) includes a tread portion (2) having at least one heat-dissipating recess portion (9). The recess portion (9) includes an opening edge (10) and an inner wall portion (11). The opening edge (10) includes a linear first edge (10a) and second edge (10b) opposite each other. The inner wall portion (11) includes a first wall surface (11a) extending from the first edge (10a) to a bottom portion (9a) at the deepest position of the recess portion (9), and a second wall surface (11b) extending from the second edge (10b) to the bottom portion (9a). An inclination angle ([theta]1) of the first wall surface (11a) with respect to a first normal (12a) to a contact surface passing the first edge (10a) is greater than an inclination angle ([theta]2) of a second wall surface (22b) with respect to a second normal (23b) to the contact surface passing the second edge (21b).

主权项

1. A pneumatic tire comprising:
a tread portion provided with at lest one cooling recess portion; the recess portion comprising an opening edge opened at a ground contacting surface of the tread portion and an inner wall extending inward of the tread portion from the opening edge; the opening edge comprising a linearly extending first edge and a linearly extending second edge facing one another; the inner wall comprising, in a cross-section perpendicular to the first edge, a first wall that extends from the first edge to a deepest bottom of the recess portion and a second wall that extends from the second edge to the bottom; and an inclination angle θ1 of the first wall with respect to a first normal line to the ground contacting surface passing the first edge being greater than an inclination angle θ2 of the second wall with respect to a second normal line to the ground contacting surface passing the second edge.