Patent ID: 7337815

Claim:
A heavy duty pneumatic tire with a tread having a cross-section of a minimum thickness of 4 centimeters and is a thermally conductive rubber composition comprised of, based upon parts by weight per 100 parts by weight of rubber (phr): (A) 100 parts by weight of at least one diene-based elastomer, (B) about 25 to about 140 phr of particulate carbon black and from zero to about 45 phr of synthetic, amorphous silica; wherein said particulate carbon black is; (1) about 2 to about 20 phr of Category (B- 1 ) carbon black and, correspondingly, about 20 to about 120 phr Category (C) carbon black, or (2) about 5 to about 25 phr of Category (A) carbon black, about 2 to about 10 phr of Category (B- 1 ) carbon black and about 20 to about 100 phr of Category (C) carbon black, or (3) about 5 to about 25 phr of Category (A) carbon black, about 2 to about 10 phr of Category (B- 2 ) carbon black and about 20 to about 100 Category (C) carbon black; wherein said Category (A) carbon black has a DBP value in a range of from 10 to about 50 cm 3 /100 g and a NSA value in a range of from about 10 to about 30 m 2 /g; wherein said Category (C) carbon black has a DBP value in a range of from 70 to about 170 cm 3 /100 g and a NSA value in a range of from about 70 to about 170 m 2 /g; and wherein said Category (B- 1 ) carbon black has a DBP value in a range of from 50 to about 250 cm 3 /100 g and a NSA value in a range of from about 180 to about 600 m 2 /g, and wherein said Category (B- 2 ) carbon black has a DBP value in a range of from 180 to about 220 cm 3 /100 g and a NSA value in a range of from about 80 to about 120 m 2 /g.