Patent ID: 9707803
Date: 2017-07-18
CPC Classifications: B60C,Y02T

Claim:
1. A pneumatic tire comprising: a cap rubber which forms a ground surface, and a base rubber which is provided in an inner side in a tire diametrical direction of the cap rubber, wherein the cap rubber has an inner cap rubber which is constructed by a non-conductive rubber forming an inner ground surface in the case that the ground surface is sectioned into two sides of a mounting inner side and a mounting outer side, and an outer cap rubber which is constructed by a non-conductive rubber and forms an outer ground surface, wherein the inner cap rubber has a branched conductive part which reaches a side surface or a bottom surface of a mounting inner end part from the ground surface of a mounting outer end part of the inner cap rubber while being branched at a plurality of positions and is formed by a conductive rubber, and the outer cap rubber does not have any branched conductive rubber, wherein the branched conductive part is formed by a conductive rubber which has a different rubber hardness from that of the non-conductive rubber forming the inner cap rubber, and wherein the rubber hardness of the inner cap rubber is set to be lower than the rubber hardness of the outer cap rubber and the rubber hardness of the branched conductive part is set to be lower than the rubber hardness of the inner cap rubber.