Pneumatic tire

A pneumatic tire, comprising:

• a circumferential main groove disposed in one region demarcated by a tire equatorial plane;
• a circumferential narrow groove disposed outward of the circumferential main groove in a tire width direction;
• a shoulder land portion and a second land portion defined by the circumferential main groove and the circumferential narrow groove;
• a plurality of closed lug grooves extending in the tire width direction and penetrating the circumferential narrow groove, the plurality of closed lug grooves having inner terminating end portions in the tire width direction inside the second land portion, the plurality of closed lug grooves having outer terminating end portions inside the shoulder land portion;
• and
• an extension length L1_min in the tire width direction of a shortest first closed lug groove and an extension length L1_max in the tire width direction of a longest second closed lug groove having a relationship 1.10≤L1_max/L1_min≤3.00;
• wherein
• the shoulder land portion includes shoulder lug grooves, the shoulder lug grooves having terminating end portions inside the shoulder land portion, extending in the tire width direction, and opening to a tire ground contact edge,
• the closed lug grooves are on extension lines of groove center lines of the shoulder lug grooves, and
• an arrangement interval P1 of the closed lug grooves and an arrangement interval P2 of the shoulder lug grooves in a tire circumferential direction have a relationship 0.30≤P1/P2≤0.70.

A pneumatic tire, comprising:

• a circumferential main groove disposed in one region demarcated by a tire equatorial plane;
• a circumferential narrow groove disposed outward of the circumferential main groove in a tire width direction;
• a shoulder land portion and a second land portion defined by the circumferential main groove and the circumferential narrow groove;
• a plurality of closed lug grooves extending in the tire width direction and penetrating the circumferential narrow groove, the plurality of closed lug grooves having inner terminating end portions in the tire width direction inside the second land portion, the plurality of closed lug grooves having outer terminating end portions inside the shoulder land portion;
• and
• an extension length L1_min in the tire width direction of a shortest first closed lug groove and an extension length L1_max in the tire width direction of a longest second closed lug groove having a relationship 1.10≤L1_max/L1_min≤3.00;
• wherein
• the shoulder land portion includes shoulder lug grooves, the shoulder lug grooves having terminating end portions inside the shoulder land portion, extending in the tire width direction, and opening to a tire ground contact edge,
• the closed lug grooves have groove center lines that do not overlap with groove center lines of the shoulder lug grooves in a tire circumferential direction, and
• an arrangement interval P1 of the closed lug grooves and an arrangement interval P2 of the shoulder lug grooves in a tire circumferential direction have a relationship 0.30≤P1/P2≤0.70.

A pneumatic tire, comprising:

• a circumferential main groove disposed in one region demarcated by a tire equatorial plane;
• a circumferential narrow groove disposed outward of the circumferential main groove in a tire width direction and having a groove width narrower than a groove width of the circumferential main groove, the groove width being a maximum distance between left and right groove walls at a groove opening portion and being measured when the tire is mounted on a specified rim, inflated to specified internal pressure, and in an unloaded state;
• a shoulder land portion and a second land portion defined by the circumferential main groove and the circumferential narrow groove;
• a plurality of closed lug grooves extending in the tire width direction and penetrating the circumferential narrow groove, the plurality of closed lug grooves having inner terminating end portions in the tire width direction inside the second land portion, the plurality of closed lug grooves having outer terminating end portions inside the shoulder land portion, the plurality of closed lug grooves being lateral grooves extending in the tire width direction and configured to open when the tire comes into contact with a ground to function as grooves;
• and
• an extension length L1_min in the tire width direction of a shortest first closed lug groove and an extension length L1_max in the tire width direction of a longest second closed lug groove having a relationship 1.10≤L1_max/L1_min≤3.00;
• wherein
• the inner terminating end portions of the closed lug grooves are arranged with positions in the tire width direction aligned in the second land portion, and
• the outer terminating end portions of the closed lug grooves are arranged offset in the tire width direction in the shoulder land portion.

A pneumatic tire, comprising:

• a circumferential main groove disposed in one region demarcated by a tire equatorial plane;
• a circumferential narrow groove disposed outward of the circumferential main groove in a tire width direction and having a groove width narrower than a groove width of the circumferential main groove, the groove width being a maximum distance between left and right groove walls at a groove opening portion and being measured when the tire is mounted on a specified rim, inflated to specified internal pressure, and in an unloaded state;
• a shoulder land portion and a second land portion defined by the circumferential main groove and the circumferential narrow groove;
• a plurality of closed lug grooves extending in the tire width direction and
• penetrating the circumferential narrow groove, the plurality of closed lug grooves having
• inner terminating end portions in the tire width direction inside the second land portion,
• the plurality of closed lug grooves having outer terminating end portions inside the shoulder land portion, the plurality of closed lug grooves being lateral grooves extending in the tire width direction and configured to open when the tire comes into contact with a ground to function as grooves;
• and
• an extension length L1_min in the tire width direction of a shortest first closed lug groove and an extension length L1_max in the tire width direction of a longest second closed lug groove having a relationship 1.10≤L1_max/L1_min≤3.00;
• wherein
• the plurality of closed lug grooves are each disposed with longitudinal directions of the outer terminating end portions inside the shoulder land portion inclined in a same direction as the inner terminating end portions inside the second land portion with respect to a tire circumferential direction.