A pneumatic tire includes a tread development width TDW in a tread portion and a tire maximum width SW which satisfy 0.70≤TDW/SW≤0.75. A profile line forming an outer surface of a sidewall portion in a tire meridian cross-section includes at least three arcs having mutually different radii of curvature. In the profile line, a radius of curvature R1 of an arc from a first point to a second point, a radius of curvature R2 of an arc from the second point to a tire maximum width position, and a radius of curvature R3 of an arc forming a portion on an inner side in the tire radial direction from the tire maximum width position satisfy R1>R2>R3. A height SDH in the tire radial direction from a bead heel to the tire maximum width position and a tire cross-sectional height SH satisfy 0.47≤SDH/SH≤0.50.

A tire comprises a tread portion provided with grooves. When the tire mounted on a standard wheel rim and inflated to a standard tire pressure is placed on a flat surface at a camber angle of zero and loaded with a standard tire load, the tire has a ground contacting patch. The depths of the respective grooves, and ground contact lengths of the ground contacting patch measured at axial positions of the respective grooves, are in a relationship in which the groove depth increases or decreases as the ground contact length increases or decreases.

In a pneumatic tire are defined: a first imaginary line VL1 passing through a ground contact surface in a meridian cross section of a tread portion, a second imaginary line VL2 passing through a bottom portion of a shoulder main groove and parallel to VL1, an intersection point between VL2 and a surface of a shoulder land portion outward of a ground contact edge T in a lateral direction, and an equatorial plane CL. Given A as a distance in the lateral direction between an intersection point P and CL, B as a groove depth of the shoulder main groove, and C as a distance in the lateral direction between T and CL, 0.80≤(B+C)/A≤1.15 is satisfied and, given E as a distance in the lateral direction between the bottom portion of the shoulder main groove and P, 2.0≤E/B≤5.0 is satisfied.

A tire having four belt plies laminated at an outside circumference of the carcass. Cords at second and third belt plies among the four belt plies, as numbered from the carcass to the outside circumference, intersect, being inclined in mutually opposite fashion with respect to a tire axis. Angles of inclination with respect to the tire circumferential direction of the second and third belt plies are such that an angle at a belt end is less than an angle at a tire equator. A first mounded region that has a peak at which the angle of inclination is greater than at a periphery and that corresponds to a shoulder rib which among the plurality of ribs is provided. The peak at the first mounded region is arranged at a shoulder rib region which appears to overlap the shoulder rib as seen in plan view.

In a tire 2, a band 22 includes a band cord 52, and a load at 4% elongation of the band cord 52 is not less than 60 N. A shape index of a ground-contact surface 60 obtained when the tire 2 is mounted on a normal rim, an internal pressure of the tire 2 is adjusted to a normal internal pressure, a normal load is applied to the tire 2, and the tire 2 is brought into contact with a road surface at a camber angle of 0°, is not less than 1.40 and not greater than 1.44.

A pneumatic tire is provided with a belt in which reinforcing cords are embedded in resin. A graph shows proportional belt chamfer height BWH values on a horizontal axis X and proportional tread chamfer height TWH values on a vertical axis Y. The proportional tread chamfer height TWH and proportional belt chamfer height BWH are specified so as to fall in a region of this graph that is bounded by a straight line expressed by the formula Y=−2.43X+17.9. This region is at the side of the straight line at which the proportional tread chamfer height TWH and proportional belt chamfer height BWH are smaller.

A tire 2 includes a tread 4 on which at least three circumferential grooves 24 continuously extending in a circumferential direction are formed, and a belt 14 located radially inward of the tread 4. A ratio of a center stretch, at a center portion of the belt, indicated by the follow/Mg formula (2) to a shoulder stretch, at an end portion of the belt, indicated by the following formula (1) is not less than 1 and not greater than 3, and the shoulder stretch is not less than 1%.

(Shoulder stretch)

100×(Rsa−Rsb)/Rsb  (1)

(Center stretch)

100×(Rca−Rcb)/Rcb  (2)

A pneumatic tire includes a carcass layer, a pair of cross belts disposed on an outer side in a radial direction of the carcass layer, and a tread rubber disposed on the outer side in the radial direction of the cross belts. A tread profile when the tire is mounted on a specified rim, inflated to a specified internal pressure, and in an unloaded state is defined by the following elliptic function ([Mathematical Formula 1]) having a center point on a tire equatorial plane. Here, “a” is the radius in a tire width direction and the major axis, “b” is the radius in the tire radial direction and the minor axis, and conditions of 0<b<a, 0<x, 0<y, 1.00<p, 1.00<q and p≠q are satisfied.

[00001]$\begin{array}{cc}{\left(\frac{x}{a}\right)}^p+{\left(\frac{y}{b}\right)}^q=1& \left[\mathrm{Mathematical}\mathrm{Formula}1\right]\end{array}$

Different sized, first and second domes are stacked, one atop the other on the surface of a rib or tread block of a tire. The lower, first dome spans a larger area of the tread. In one embodiment, the first dome covers the entire tread block or extends laterally across a rib. The upper, second dome is located on top of the first dome and spans only a portion of the first dome. The domes are either concentric or offset, or can be elliptical with the major axes of the ellipses oriented such that the major axes are optimized for a specific tread block or rib geometry. The major axes of the ellipses may be oriented parallel to or perpendicular to an axis of stiffness of the tread block or rib.

A pneumatic tire includes cross belts and one or more protective belts provided in the tire radial direction. A width of a widest protective belt is greater than a width of any of the cross belts. In the tire profile, a maximum projection position of the widest protective belt is A, an end position of the widest protective belt is B, a position at which a straight line a passing through position A extending in the direction normal to a tread surface intersects with the tread surface is A′, and a position at which a straight line b passing through position B extending in the direction normal to the tread surface intersects with the tread surface is B′. An angle formed between a first straight line that links position A and position B and a second straight line that links position A′ and position B′ is from 0° to 15°.