Patent ID: 8403012
Filing Date: 2013-03-26
Classification: B60C,Y10T

Abstract:
1. A tire tread comprising: a tread having first and second shoulder regions and a mid-section between the first and second shoulder regions, the tread also having a tread depth and an outer ground contacting surface; a treadwear indicator molded into the first shoulder region of the tread, the treadwear indicator comprising first, second and third symbols; wherein the first and second symbols are alphanumeric characters and the third symbol substantially surrounds the first and second symbols; wherein the first, second and third symbols are visible on the ground contacting surface prior to wearing the tread; wherein the first symbol is invisible and the second and third symbols are visible on the ground contacting surface after the tread has been worn radially a first amount; and, wherein the first and second symbols are invisible and the third symbol is visible on the ground contacting surface after the tread has been worn radially a second amount that is greater than the first amount; and, wherein the third symbol comprises three non-continuous walls.