Abstract: A pneumatic tire has a tread rubber made of a nonconductive rubber. The tread rubber is provided with a first and second conductive portions made of a conductive rubber. The first conductive portion extends radially inwardly from a ground-contacting surface, extends to one side in tire width direction, and reaches a carcass layer or a side wall rubber. An exposed position of the first conductive portion is separated from a tire equator at a distance is equal to or more than 10% of a ground-contacting width. The second conductive portion extends radially inwardly from the ground-contacting surface, extends to another side in tire width direction, and reaches the carcass layer or the side wall rubber. An exposed position of the second conductive portion is separated from the tire equator at a distance is equal to or more than 10% of the ground-contacting width.

Abstract: A pneumatic tire has a tread rubber made of a nonconductive rubber. The tread rubber is provided with a first and second conductive portions made of a conductive rubber. The first conductive portion extends radially inwardly from a ground-contacting surface, extends to one side in tire width direction, and reaches a carcass layer or a side wall rubber. An exposed position of the first conductive portion is separated from a tire equator at a distance is equal to or more than 10% of a ground-contacting width. The second conductive portion extends radially inwardly from the ground-contacting surface, extends to another side in tire width direction, and reaches the carcass layer or the side wall rubber. An exposed position of the second conductive portion is separated from the tire equator at a distance is equal to or more than 10% of the ground-contacting width.

Abstract: A pneumatic tire has a tread rubber made of a nonconductive rubber. The tread rubber is provided with a first and second conductive portions made of a conductive rubber. The first conductive portion extends radially inwardly from a ground-contacting surface, extends to one side in tire width direction, and reaches a carcass layer or a side wall rubber. An exposed position of the first conductive portion is separated from a tire equator at a distance is equal to or more than 10% of a ground-contacting width. The second conductive portion extends radially inwardly from the ground-contacting surface, extends to another side in tire width direction, and reaches the carcass layer or the side wall rubber. An exposed position of the second conductive portion is separated from the tire equator at a distance is equal to or more than 10% of the ground-contacting width.

Abstract: A pneumatic tire has a center rib extending along a tire circumferential direction in a center portion of a tread surface. A width of the center rib is equal to or more than 10% of a grounding width. An outside rubber having a relatively high tension modulus is arranged outside a vehicle and an inside rubber having a relatively low tension modulus is arranged inside the vehicle, by setting an interface formed in the center rib along a tire diametrical direction to a boundary. 300% tension modulus Mo and a rubber hardness Ho of the outside rubber, and 300% tension modulus Mi and a rubber hardness Hi of the inside rubber satisfy the following relationship: (Mo?Mi)/Mo?0.15 Ho?Hi?±3 degree.

Abstract: A pneumatic tire has a tread rubber made of a nonconductive rubber. The tread rubber is provided with a first and second conductive portions made of a conductive rubber. The first conductive portion extends radially inwardly from a ground-contacting surface, extends to one side in tire width direction, and reaches a carcass layer or a side wall rubber. An exposed position of the first conductive portion is separated from a tire equator at a distance is equal to or more than 10% of a ground-contacting width. The second conductive portion extends radially inwardly from the ground-contacting surface, extends to another side in tire width direction, and reaches the carcass layer or the side wall rubber. An exposed position of the second conductive portion is separated from the tire equator at a distance is equal to or more than 10% of the ground-contacting width.

Abstract: A pneumatic tire has a center rib extending along a tire circumferential direction in a center portion of a tread surface. A width of the center rib is equal to or more than 10% of a grounding width. An outside rubber having a relatively high tension modulus is arranged outside a vehicle and an inside rubber having a relatively low tension modulus is arranged inside the vehicle, by setting an interface formed in the center rib along a tire diametrical direction to a boundary. 300% tension modulus Mo and a rubber hardness Ho of the outside rubber, and 300% tension modulus Mi and a rubber hardness Hi of the inside rubber satisfy the following relationship: (Mo?Mi)/Mo?0.15 Ho?Hi?±3 degree.