TIRE

A tire, wherein a lug groove is open at a ground contact edge when moving straight, a first inclination angle at an acute side, θ, relative to a tire width direction, of a first straight line L, which connects a first point Q and a second point Q, is larger than a second inclination angle at an acute side, θ, relative to the tire width direction, of a second straight line L, which connects a third point Q and a fourth point Q, 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.