Tire

A tire, comprising

• a belt layer disposed in a tread portion and comprising a plurality of belt plies;
• the belt layer comprising
• a pair of cross-belt layers in which inclination directions of belt cords in a tire width direction with respect to a tire circumferential direction are opposite to each other;
• and,
• a circumferential reinforcing layer in which an inclination angle of the belt cords in the tire width direction with respect to the tire circumferential direction is 5° or less;
• the tread portion comprising at least one circumferential groove extending in the tire circumferential direction in a range in which the circumferential reinforcing layer is disposed in the tire width direction;
• in at least one circumferential groove of the at least one circumferential groove, a projection portion projecting from a groove wall on at least one side into the circumferential groove and connected to a groove bottom being disposed;
• in the circumferential groove comprising the projection portion, a road contact surface-side cross-sectional area S1, which is a cross-sectional area from a tread contact surface to a position corresponding to one-half of a groove depth of the circumferential groove, and a groove bottom-side cross-sectional area S2, which is a cross-sectional area from the position corresponding to one-half of the groove depth from the tread contact surface to the groove bottom, satisfying a relationship 0.1≤S2/S1≤0.7;
• and,
• in the tread portion, a ratio D0/W0 of a thickness D0 from the tread contact surface to the circumferential reinforcing layer to a width W0 of the circumferential reinforcing layer in the tire width direction being defined as a deformation potential Tp of the tread portion, and the deformation potential Tp of the tread portion being within a range of 0.06≤Tp≤0.20.