Patent ID: 6343634
Filing Date: 2002-02-05
Classification: B60C,Y10S

Abstract:
A pneumatic tire comprising:a tread rubber extending over a ground contacting region of the tire, tread grooves disposed in the ground contacting region, each tread groove having sidewalls, static electricity grounding means comprising grounding terminals and a collector, the collector and grounding terminals being made of a conductive rubber compound containing at least 15 phr of carbon black to have a volume resistivity of less than 100 megaohm cm, and the tread rubber being made of a low-hysteresis-loss rubber compound containing silica as a reinforcing agent and having a volume resistivity more than that of the electrically conductive rubber compound, said collector disposed radially inside the tread grooves, and said grounding terminals disposed in the tread grooves and extending radially outwardly from the collector to the level of the ground contacting region at least, wherein each grounding terminal is spaced from both sidewalls of the tread grooves in which it is disposed and has a thickness of from 0.5 to 3.0 mm.