| 摘要 |
There is provided a heavy duty tire made by using as a tread rubber a rubber composition obtained by compounding 100 parts by mass of a rubber component consisting of 90-30% by mass of (a) natural rubber and 10-70% by mass of (b) a solution-polymerized styrene-butadiene copolymer rubber containing tin in at least one of a middle of a polymer molecular chain and a terminal of the molecular chain and having a bound styrene content of 28-45% by mass and a vinyl bond content in a butadiene portion of less than 30 mol% with 40-60 parts by mass in total of (c) carbon black and (d) silica, provided that an amount of (d) silica as a filler is 5-20 parts by mass. In the heavy duty tire, the resistance to uneven wear is considerably improved without damaging the heat buildup and wear resistance.
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