| 摘要 |
A pneumatic tire (T) has a conductive portion (13), formed by a conductive rubber, provided in the tread rubber (10) formed by a nonconductive rubber. The conductive portion (13) has an outer skin portion (13a) and a projection portion (13b). The outer skin portion (13a) is formed on a surface of the tread rubber (10), and extends to an inner side in a tire width direction from a side surface of the tread rubber (10) so as to terminate at a position which goes beyond a contact end (E). The projection portion (13b) spirally extends from a position outside of the contact end (E) in the tire width direction so as to reach a position inside of the contact end (E) in the tire width direction, and protrudes to an inner side in a tire diametrical direction from the outer skin portion (13a) so as to terminate without reaching a bottom surface of the tread rubber (10). |
