In a state in which the pneumatic tire is mounted on a regular rim and inflated to 5% of a specified internal pressure, a tread width is TW, a total tire width is SW in a tire meridian cross-sectional view, a relationship of 0.80≤TW/SW≤0.95 is satisfied, a ground contact width at a load of 100% of a maximum load capacity is CW100, a ground contact width at a load of 70% of the maximum load capacity is CW70, and a relationship of 1.04≤CW100/CW70≤1.15 is satisfied.

In a state in which the pneumatic tire is mounted on a regular rim and inflated to 5% of a specified internal pressure, a tread width is TW, a total tire width is SW in a tire meridian cross-sectional view, a relationship of 0.80≤TW/SW≤0.95 is satisfied, a ground contact width at a load of 100% of a maximum load capacity is CW100, a ground contact width at a load of 70% of the maximum load capacity is CW70, and a relationship of 1.04≤CW100/CW70≤1.15 is satisfied.

A pneumatic tire comprises a carcass ply extending between bead portions through a tread portion and sidewall portions, and turned up around a bead core from the inside to the outside of the tire in each of the bead portions, so as to form a pair of turnup portions and a main portion therebetween. In each the bead portion, a first apex rubber and a second apex rubber are disposed. The first apex rubber is disposed between the turnup portion and the main portion. The second apex rubber is disposed axially outside the turnup portion. A complex elastic modulus b of the second apex rubber is larger than that of the first apex rubber. The cross-sectional width wt in mm of the tire and the outer diameter Dt in mm of the tire satisfy the following conditions Dt=<59.078×wt.sup.0.498 and Dt>=59.078×wt.sup.0.460.

A pneumatic tire comprises a carcass ply extending between bead portions through a tread portion and sidewall portions, and turned up around a bead core from the inside to the outside of the tire in each of the bead portions, so as to form a pair of turnup portions and a main portion therebetween. In each the bead portion, a first apex rubber and a second apex rubber are disposed. The first apex rubber is disposed between the turnup portion and the main portion. The second apex rubber is disposed axially outside the turnup portion. A complex elastic modulus b of the second apex rubber is larger than that of the first apex rubber. The cross-sectional width wt in mm of the tire and the outer diameter Dt in mm of the tire satisfy the following conditions Dt=<59.078×wt.sup.0.498 and Dt>=59.078×wt.sup.0.460.

A heavy duty pneumatic tire in which occurrence of uneven wear is inhibited is provided. In the tire, each shoulder land portion includes a groove wall portion forming a wall of a shoulder circumferential groove, and a cap portion located outward of the groove wall portion in an axial direction. A wear resistance index of the groove wall portion is lower than a wear resistance index of the cap portion. A ratio of a distance in the axial direction from an outer edge of the shoulder circumferential groove to a boundary between the groove wall portion and the cap portion on an outer surface of the shoulder land portion, to a width in the axial direction of the shoulder land portion, is not less than 20% and not greater than 30%.

A motorcycle tire comprises a tread reinforcement including a jointless band ply. The jointless band ply has a developed width Wa of not more than 65% of the developed tread width TWe. The tread portion has a tread profile comprising a crown arc portion having a radius R1 of curvature and a pair of shoulder arc portions having a radius R2 of curvature. The radius R1 is smaller than the radius R2 and smaller than 50% of the maximum tire cross-section width Wt. In a normal state of the tire, the axial ends of the crown arc portion are respectively positioned axially inward of the outer edges of the jointless band ply.

A tire (10) comprises a crown (12) comprising a tread (20), a crown reinforcement (14), two sidewalls (22), two beads (24), with each sidewall (22) connecting each bead (24) to the crown (12), the crown reinforcement (14) extending into the crown (12). The tire (10) comprises a radial carcass reinforcement (32) anchored in each of the beads (24) and extending into the sidewalls (22), and the crown reinforcement (14) is radially inserted between the carcass reinforcement (32) and the tread (20). The tire (10) has a sidewall height that is greater than or equal to 110 mm and a load index that is greater than or equal to 94. The carcass reinforcement (32) comprises a single carcass ply (34) comprising at least one reinforcer element comprising an assembly formed by: a multifilament strand made of aromatic polyamide or aromatic co-polyamide; and a multifilament strand made of polyester.

A tire 1 for motorcycles comprises a carcass 6, a belt layer 7, and a tread rubber 2G. The belt layer 7 includes at least one reinforcing cord coated with rubber and spirally wound. In a meridian section passing through a tire rotational axis of the tire 1 in a standard state, a width BW of the belt layer 7 in a tire axial direction is in a range of from 60% to 80% of a tread width TW. The tread rubber 2G has a thickness at a tire equator (C) in a range of from 70% to 90% of thickness at tread edges (2t).

A tire 1 for motorcycles comprises a carcass 6, a belt layer 7, and a tread rubber 2G. The belt layer 7 includes at least one reinforcing cord coated with rubber and spirally wound. In a meridian section passing through a tire rotational axis of the tire 1 in a standard state, a width BW of the belt layer 7 in a tire axial direction is in a range of from 60% to 80% of a tread width TW. The tread rubber 2G has a thickness at a tire equator (C) in a range of from 70% to 90% of thickness at tread edges (2t).

In a pneumatic tire including a tread portion, a pair of side wall portions, and a pair of bead portions, a carcass layer is mounted between the bead portions, the tread portion has a multilayer structure including a cap tread rubber layer and an undertread rubber layer, and a snow traction index is 180 or more. A tread radius in a meridian cross-section of the tread portion falls within a range of from 80% to 140% of a tire outer diameter, a ground contact width of the tread portion falls within a range of from 66% to 83% of a tire cross-sectional width, and a height of a bead filler is 40% or less of a tire cross-sectional height.