| 摘要 |
A heavy-duty pneumatic tire is provided in which it is possible to prevent cracks (including cracks generating from the joint) from generating in the rubber portions that come into contact with the rim flanges during the period from no load to a high load when the tire has been inflated to a proper air pressure, and which can hence have greatly improved durability. The heavy-duty pneumatic tire has a rubber chafer (8) disposed in at least the area of each bead portion (1) which comes into contact with the rim, and is configured so that the rubber chafer (8) is formed from a rubber composition comprising: 100 parts by mass of a rubber component comprising 45-55 parts by mass of butadiene rubber having 10-30 parts by mass of polybutadiene rubber containing a syndiotactic 1,2-structure and 45-55 parts by mass of natural rubber; and 50-60 parts by mass, excluding 50 and 60 parts by mass, of carbon black having a DBP of 85-115 mL/100 g and an N2SA of 50-100 m2/g. |
