Sughrue, Mion, Zinn, Macpeak & Seas
Tread rubber compositions for heavy duty pneumatic tire
 A tread rubber composition for heavy duty pneumatic tire comprises a particular amount of a particular carbon black satisfying CTAB of 130-160 m.sup.2 /g, DBP of 90-120 m/100 g and Dm of not more than 210 .ANG., based on 100 parts by weight of at least one rubber component. 
Bridgestone Corporation
C C C C
C08K C09C C01P C01P
inventional inventional additional additional
Masayuki Hiroshi
Ohashi Yamada