Pneumatic tire

A pneumatic tire comprising:

• a first side member disposed at a first side of the pneumatic tire and a second side member disposed at a second side of the pneumatic tire opposite to the first side in a widthwise direction of the pneumatic tire;
• and
• a tread section disposed between the first and second side members, the tread section having a tread pattern including a pair of circumferential main grooves and a land section;
• the pair of circumferential main grooves extending linearly in a circumferential direction of the pneumatic tire;
• the land section extending in the circumferential direction of the pneumatic tire and being sandwiched between the pair of circumferential main grooves, the land section including a sub groove and a first sipe, the sub groove extending in the circumferential direction of the pneumatic tire without connecting to the pair of circumferential main grooves, and the first sipe connecting between the sub groove and a first one of the circumferential main grooves and being present in a portion of the land section that is between the sub groove and the second side of the pneumatic tire;
• the sub groove including a first groove section and a second groove section, the first groove section extending diagonally toward the first side of the pneumatic tire at a first slant angle of 0 to 30 degrees with respect to the circumferential direction of the pneumatic tire, and the second groove section connecting to the first groove section so as to form a bend and extending diagonally toward the second side of the pneumatic tire at a second slant angle of 10 to 45 degrees with respect to the circumferential direction of the pneumatic tire, such that an absolute value of the second slant angle at which the second groove section extends with respect to the circumferential direction of the pneumatic tire is larger than an absolute value of the first slant angle at which the first groove section extends with respect to the circumferential direction of the pneumatic tire;
• an edge of the land section located where the land section adjoins a second one of the circumferential main grooves including chamfers disposed at regular intervals along the circumferential direction of the pneumatic tire, each of the chamfers including a portion where a width of the chamfer widens along the circumferential direction of the pneumatic tire opposing a rotation direction of the pneumatic tire and a portion where the width of the chamfer narrows along the circumferential direction opposing the rotation direction;
• and
• a portion of the land section that is between the sub groove and the first side of the pneumatic tire including a second sipe, the second sipe being configured to connect the sub groove to a second one of the circumferential main grooves, the second sipe being slanted diagonally toward the second side of the pneumatic tire toward which the second groove section is slanted with respect to the circumferential direction of the pneumatic tire, and the second sipe connecting to the second one of the circumferential main grooves at a position along the circumferential direction of the pneumatic tire corresponding to a location where the width of the chamfer is largest.

A pneumatic tire comprising:

• a first side member disposed at a first side of the pneumatic tire and a second side member disposed at a second side of the pneumatic tire opposite to the first side in a widthwise direction of the pneumatic tire;
• and
• a tread section disposed between the first and second side members, the tread section having a tread pattern including a pair of circumferential main grooves and a land section;
• the pair of circumferential main grooves extending linearly in a circumferential direction of the pneumatic tire;
• the land section extending in the circumferential direction of the pneumatic tire and being sandwiched between the pair of circumferential main grooves, the land section including a sub groove and a first sipe, the sub groove extending in the circumferential direction of the pneumatic tire without connecting to the pair of circumferential main grooves, and the first sipe connecting between the sub groove and a first one of the circumferential main grooves and being present in a portion of the land section that is between the sub groove and the second side of the pneumatic tire;
• the sub groove including a first groove section and a second groove section, the first groove section extending diagonally toward the first side of the pneumatic tire at a first slant angle of 0 to 30 degrees with respect to the circumferential direction of the pneumatic tire, and the second groove section connecting to the first groove section so as to form a bend and extending diagonally toward the second side of the pneumatic tire at a second slant angle of 10 to 45 degrees with respect to the circumferential direction of the pneumatic tire, such that an absolute value of the second slant angle at which the second groove section extends with respect to the circumferential direction of the pneumatic tire is larger than an absolute value of the first slant angle at which the first groove section extends with respect to the circumferential direction of the pneumatic tire;
• the tread section further comprising:
• a pair of outside circumferential grooves, a first one of the outside circumferential grooves being positioned between the first one of the circumferential main grooves and the second side of the pneumatic tire and a second one of the outside circumferential grooves being positioned between a second one of the circumferential main grooves and the first side of the pneumatic tire;
• outside land sections provided between the first one of the outside circumferential grooves and the first one of the circumferential main grooves and between the second one of the outside circumferential grooves and the second one of the circumferential main grooves, each of the outside land sections including a third sipe, configured such that the third sipe in each of the outside land sections that are provided between the first one of the outside circumferential grooves and the first one of the circumferential main grooves connects between the first one of the outside circumferential grooves and the first one of the circumferential main grooves and the third sipe in each of the outside land sections that are provided between the second one of the outside circumferential grooves and the second one of the circumferential main grooves connects between the second one of the outside circumferential grooves and the second one of the circumferential main grooves;
• and
• shoulder land sections positioned between the first one of the outside circumferential grooves and the second side of the pneumatic tire and between the second one of the outside circumferential grooves and the first side of the pneumatic tire, each of the shoulder land sections including a shoulder lug groove and a fourth sipe, the shoulder lug groove being configured to curve to assume an extension orientation closer to the widthwise direction of the pneumatic tire as the shoulder lug groove approaches a widthwise outside location of the pneumatic tire, and the shoulder lug groove being further configured to close off at an intermediate position without connecting to a respective one of the first and second outside circumferential grooves, and the fourth sipe being configured to connect between the respective one of the first and second outside circumferential grooves and the closed off end of the shoulder lug groove.