A tire includes a pair of beads and a crown region including a circumferential tread disposed radially above a circumferential belt. The tire further includes a pair sidewalls extending from the pair of beads to the crown region. A body ply wraps around the pair of beads and terminates in a pair of turn up ends in the crown region, below the middle 30% of the circumferential belt. A conductive substance is disposed along a strip of the body ply.

The present disclosure relates to a pneumatic tire having at least one electrically conductive pathway capable of dissipating electrostatic charges generated in a vehicle to a road surface while achieving low rolling resistance and improved wet traction tire performances. The pneumatic tire has a tread portion which includes a tread cap layer forming a ground contacting surface and a tread base layer underlying the tread cap layer. The tread cap layer contains at least one electrically conductive pathway locally extending from the ground-contacting surface of the tread cap layer to contact the tread base layer. The electrically-conductive pathway is composed of a UV-cured rubber composition which is electrically conductive.

In A pneumatic tire, a conductive portion is arranged between peripheral grooves in the outermost side in a tire width direction and is arranged in a land portion including a whole void ratio maximum difference position. The whole void ratio maximum difference position is a position where a difference of a void ratio between one side and the other side in the tire width direction becomes maximum in a void ratio of the outer surface between ground ends of a tread rubber in the tire width direction.

A tire with radial carcass reinforcement comprising a crown reinforcement itself capped radially with a tread of which the tread pattern comprises at least two circumferential grooves. The tread is made up of at least three layers, a first layer forming the radially outer part of the tread of a first compound having an electrical resistivity per unit volume .sub.1 such that log(.sub.1) is less than 6, a second layer radially on the inside of at least three parts, at least the axially outer parts of a second compound having an electrical resistivity per unit volume .sub.2 such that log(.sub.2) is greater than 10, and at least part, radially extending the at least first elastomeric compound of the first layer, of a third elastomeric compound having an electrical resistivity per unit volume .sub.3 such that log(.sub.3) is less than 6, a third layer radially furthest towards the inside of at least five parts, at least the axially outer parts of a third elastomeric compound having a maximum value of tan(), denoted tan()max, of less than 0.080, at least two parts of the second compound, and at least part of the third layer, that radially extends the at least one part of the second layer of the third elastomeric compound.

A tire includes a body ply sheet having a rubber core defined by a top surface having a length and a width, a bottom surface having substantially the same length and width, and side surfaces having a common height. The rubber core is further defined by a top rubber layer and a bottom rubber layer. The body ply sheet includes reinforcement cords disposed between the top rubber layer and the bottom rubber layer. The reinforcement cords are spaced 0.1-4.0 mm apart from each other and span the width of the body ply sheet. Bleeder cords are disposed on the body ply sheet and spaced 8-12 cm apart from each other. Conductive cords are also disposed on the body ply and spaced 20-80 cm apart from each other.

A pneumatic vehicle tire has at least a tread with an outer tread cap with a profiled tread surface, an inner tread base and at least one electrically conductive conductivity strip. The conductivity strip extends in a radial direction from the tread base, through the tread cap, to the tread surface. The tire further includes an electrically non-conductive belt bandage arranged under the tread base and the belt bandage has a multiplicity of gaps, a multi-ply belt, a carcass and side walls. The gaps in the belt bandage are filled with an electrically conductive material.

Provided is a pneumatic tire ensuring conductivity while being reduced in weight, and having good fuel efficiency and handling stability. The tire includes a sidewall and a carcass, the sidewall including a laminate of two or more rubber layers including an inner sidewall layer (1) located closest to the carcass, and an outer sidewall layer (2) constituting an outer surface of the tire; the layer (1) including a rubber composition for (1); the layer (2) including a rubber composition for (2); the carcass including a carcass cord topped with a rubber composition for a carcass cord topping (3); the sidewall having a thickness of 3.0 mm or less; the layer (1) having a thickness of 0.2-1.0 mm; the composition for (1) having a volume resistivity of 5.010.sup.7 .Math.cm or less; the compositions for (1) and for (2), and the compositions for (3) and for (1) satisfying specific relations.

A pneumatic tire has a tread rubber. The tread rubber has a cap rubber, a base rubber, and a conductive portion. The cap rubber which is formed by a non-conductive rubber and constructs a ground contact surface. The base rubber which is provided in an inner side of the cap rubber in the tire radial direction. The conductive portion which is formed by a conductive rubber, extends in a thickness direction of the tread rubber and reaches a bottom surface of the tread rubber from the ground contact surface. The conductive portion extends in a tire circumferential direction while oscillating its width in a tire width direction in a plan view.

A tire has a cap rubber formed of a nonconductive rubber and forms a ground surface, and a conductive portion provided in at least one side end portion of a pair of side end portions in both ends in a tire width direction. The conductive portion is formed of a conductive rubber, and reaches a side surface of the cap rubber from the ground surface through an inner portion of the cap rubber. The conductive portion is the smallest in thickness in the ground surface, is relatively large in thickness in the side surface of the cap rubber, is gradually increased in thickness from the ground surface to the side surface of the cap rubber, and is formed into a trumpet shape which is curved into an inner side in a tire width direction and an inner side in a radial direction, in a tire meridian cross section.

A tire has a cap rubber formed of nonconductive rubber and forms a ground surface, and a conductive portion provided in at least one side end portion of a pair of side end portions in both ends in a tire width direction. The conductive portion is formed of a conductive rubber, and reaches a side surface of the cap rubber from the ground surface through an inner portion of the cap rubber. The conductive portion is relatively small in a thickness in the ground surface and a side surface of the cap rubber, is relatively large in the maximum thickness of an intermediate portion between the ground surface and the side surface of the cap rubber, and is formed into a crescent shape which is curved into an inner side in a tire width direction and an inner side in a radial direction, in a tire meridian cross section.