Patent ID: 8915273
Filing Date: 2014-12-23
Classification: B60C,Y02T,Y10S

Abstract:
1. A pneumatic tire comprising a tread portion provided with one or more circumferential grooves extending in parallel with a tire equator to define a plurality of land portions, wherein at least surface rubber of the tread portion has tan δ of at 30 degrees Celsius of not less than 0.02 and not more than 0.2, a wall angle of a widthwise outer wall of at least one side circumferential groove is larger than a wall angle of a widthwise inner wall of the at least one side circumferential groove, the at least one side circumferential groove being at least one of the circumferential grooves located between the tire equator and a tread end, a plurality of sipes extending in a direction across the tire equator are provided in the land portions, and lengths of all of the sipes formed in an end portion of the land portion arranged adjacent to the at least one side circumferential groove in the widthwise outer side are respectively longer than lengths of all of the sipes formed in an end portion of the land portion arranged adjacent to the at least one side circumferential groove in the widthwise inner side, and all of the sipes each terminate in the respective land portion.