Tire

A tire, wherein

• a tread portion is provided with, on at least a half portion of the tire on one side relative to a tire equatorial plane:
• a circumferential groove;
• a shoulder land portion partitioned between the circumferential groove and a ground contact edge when moving straight;
• and
• a lug groove provided on the shoulder land portion,
• the lug groove is open at the ground contact edge when moving straight,
• a first inclination angle at an acute side, θ1, relative to a tire width direction, of a first straight line L1, which connects a first point Q1 located on a tire widthwise position of an inner end in the tire width direction of the lug groove on a ground contact line when moving straight and a second point Q2 located on the ground contact edge when moving straight on the ground contact line when moving straight, is larger than a second inclination angle at an acute side, θ2, relative to the tire width direction of, a second straight line L2, which connects a third point Q3 located on an inner end in the tire width direction of a groove width center line of the lug groove and a fourth point Q4 located on the ground contact edge when moving straight on the groove width center line of the lug groove, and
• a width of the lug groove gradually increases, without remaining constant, as it extends to the outer side in the tire width direction, from at least the inner end in the tire width direction of the lug groove to the ground contact edge when moving straight.