| 摘要 |
A pneumatic tire with excellent run-flat performance that can improve durability of a tire and promote low fuel comsuption is provided. The pneumatic tire has a reinforcing rubber layer with a nearly crescent cross section at the inner side of a carcass layer of a side wall, wherein the reinforcing rubber layer comprises a rubber composition which comprises 100 parts by weight of a diene rubber component containing from 15 to 50 parts by weight of a butadiene rubber or a styrene-butadiene rubber, its molecular end being modified with a modifier, polymerized using an organic lithium catalyst, and from 40 to 80 parts by weight of carbon black having a nitrogen adsorption specific surface area (N2SA) of from 20 to less than 30 m2/g and a dibutyl phthalate (DBP) absorption of from 50 to 155 cm3/100 g, and loss tangent (tan delta) of the rubber composition measured at 70° C. is less than 0.07. |
