| 摘要 |
PROBLEM TO BE SOLVED: To improve wear resistance of a tread surface.SOLUTION: There is provided a pneumatic tire including, in a tire diametrically outside of a carcass layer 6, a steel reinforcing layer 9 in which steel cords with angles of substantially 90 degrees with respect to a tire circumferential direction are arranged side by side in a tire circumferential direction, the steel reinforcing layer 9 being formed in a range including at least a region of 15% of an effective belt width from both tire width-direction outside ends of an effective belt width in a belt layer toward a tire width-direction inside. In the pneumatic tire, when an intersection of respective extended lines of a shoulder side arc 21b and a side part arc 21d is a reference point P, 0.02×&bgr;+0.4≤&thetas;≤0.035×&bgr;+1.7 is satisfied for a tire profile &bgr;, wherein an angle &thetas; is an angle between a straight line A connecting the reference point and a center crown CC, and a straight line B in the tire width direction that passes through the center crown, and also a radius of a curvature Rc of a central part arc 21a and a radius of a curvature Rs of a shoulder side arc satisfy 12≤Rc/Rs≤30, and a reference deployment width L from a tire equatorial plane CL to a tire width-direction inner end of the shoulder side arc, and a tread deployment width TDW satisfy 0.2≤L/(TDW/2) ≤0.7. |
