Patent ID: 7530378

Claim:
A speckled tire tread comprising: a tire tread including a primary tread compound defining a matrix and discrete particles of a first secondary tread compound being dispersed throughout at least a portion of the matrix, the primary tread compound being of a first color, including no less than about 5 phr carbon black, and being substantially devoid of silica, and the first secondary tread compound being of a second color that is different than the color of the primary tread compound, and including a conjugated diene, no more than about 3 phr carbon black, no less than 20 phr silica, and at least about 20 phr more rubber processing oil than the primary tread compound, wherein the primary tread compound and secondary tread compound being visually distinguishable by a subject when the particles are viewed on a running surface of the tire tread.