| 摘要 |
PURPOSE:To remarkably reduce the heat build-up of a tread part and improve rolling resistance and wear resistance by using a rubber composition in which specified quantities of specified carbon black and trans-octenama are compounded, for said tread part. CONSTITUTION:A tread part, a side wall part, and a bead part are provided in a pneumatic tire. In this case, a rubber composition in which 30-70pts.wt. of carbon black which has more than 70m<2>/g of nitrogen adsorbing area/weight ratio and more than 85ml/100g of dibutyl phthalate (DBP) oil absorption value, with respect to 100pts.wt of at least one kind of rubber selected from a group consisting of natural rubber and a dien group synthetic rubber, and 2-10pts.wt. of trans cotenama, are compounded, is used for the tread part. Thereby, the heat build-up of the tread part can be remarkably reduced, resulting in improvement in rolling resistance and wear resistance. |
