| 摘要 |
<p>A tire tread comprising first and second shoulder regions (22, 30) and a mid-section (24) between the first and second shoulder regions (22, 30) is disclosed. The tread (10) has a tread depth (TD), an outer ground contacting surface (28), and a treadwear indicator (20) comprising first, second and third symbols (32, 34, 36). The first and second symbols (32, 34) are alphanumeric characters and the third symbol (36) substantially surrounds the first and second symbols (32, 34). The first, second and third symbols (32, 34, 36) are visible on the ground contacting surface (28) prior to wearing the tread (10). The first symbol (32) is invisible and the second and third symbols (34, 36) are visible on the ground contacting surface after the tread (10) has been worn radially a first amount. The first and second symbols (32, 34) are invisible and the third symbol (36) is visible on the ground contacting surface after the tread (10) has been worn radially a second amount that is greater than the first amount.</p> |
