Abstract: A pneumatic tire is provided with an electrically conductive path extending continuously from a position in the rim contacting surface to a position in the ground contacting surface through a sidewall portion, wherein a sidewall rubber is a high-performance rubber compound and almost-insulative, having a volume resistivity of not less than 1×10^8 ohm cm. The electrically conductive path includes a helical path made of an electrically conductive rubber having a volume resistivity of not more than 1×10^7 ohm cm. The helical path is disposed axially inside the sidewall rubber and extends spirally around the tire rotational axis. Preferably, the tread rubber, clinch rubber and carcass topping rubber are also almost-insulative high-performance rubber compounds.

Abstract: A pneumatic tire is provided with an electrically conductive path extending continuously from a position in the rim contacting surface to a position in the ground contacting surface through a sidewall portion, wherein a sidewall rubber is a high-performance rubber compound and almost-insulative, having a volume resistivity of not less than 1×10ˆ8 ohm cm. The electrically conductive path includes a helical path made of an electrically conductive rubber having a volume resistivity of not more than 1×10ˆ7 ohm cm. The helical path is disposed axially inside the sidewall rubber and extends spirally around the tire rotational axis. Preferably, the tread rubber, clinch rubber and carcass topping rubber are also almost-insulative high-performance rubber compounds.

Abstract: In a strip wind manufacturing method, the invention provides a manufacturing method of a rubber member for a tire, which can reduce an air remnant in a rubber member. In a manufacturing method of a rubber member for a tire for manufacturing the rubber member having a plurality of overlapping layers for the tire by spirally winding a ribbon-shaped unvulcanized rubber strip around an approximately cylindrical wound body, a torsional direction of a spiral and an axial winding direction are set identical between a first rubber strip forming a first rubber layer in an inner side in a radial direction by spirally winding, and a second rubber strip forming a second rubber layer by spirally winding in an outer side thereof.

Abstract: A pneumatic tire which comprises a carcass and a band disposed radially outside the carcass, the band made of parallel cords wound spirally around the breaker, the band comprising a plurality of circumferential portions which are at least one parallel cord portion in which the windings of the band cords are laid in parallel with the tire equator and at least one inclined cord portion in which the windings of the band cords are laid at an inclination angle of 0.3 to 5 degrees to the tire equator, and the total circumferential length of the at least one inclined cord portion being not more than 50% of the whole circumferential length of the band.