| 摘要 |
The present technology pertains to a pneumatic tire (1) comprising: a pair of bead portions (2); sidewall portions (3) connected to the pair of bead portions; and a tread portion (10) connected to the sidewall portions. A ratio between a total width (SW) and an outer diameter (OD) of the pneumatic tire satisfies the relationship SW/OD≦0.3. Moreover, if the length along a tread profile (12) from a first side second reference point (Q1) to a second side second reference point (Q2) is the developed tread width (TDW), and an angle formed between a straight line that connects the second reference points and the profile center (cc), and a straight line parallel to the tire width direction is an amount of depression (θ), the following relationships are satisfied: 0.8≦TDW/SW<1, and 1.5°≦θ≦4.5°. |
| 主权项 |
1. A pneumatic tire, comprising: a pair of bead portions; sidewall portions connected to the pair of bead portions; and a tread portion connected to the sidewall portions; wherein
a ratio between a total width SW and an outer diameter OD of the pneumatic tire satisfies a relationship
SW/OD≦0.3, a tread profile that is a profile line of a surface of the tread portion in cross-sectional view in a tire meridian direction is formed by connecting a plurality of arcs with different radii of curvature, including a center portion arc located in a center in a tire width direction, side portion arcs located on an outermost side in the tire width direction of the tread portion, and shoulder side arcs connected to the side portion arcs and located on the outer side in the tire width direction next to the side portion arcs, and in a cross-sectional view in the tire meridian direction, when a point of intersection of an extended line of the shoulder side arc and an extended line of the side portion arc on a first side is a first side first reference point, a point of intersection of a straight line passing through the first side first reference point perpendicular to the tread profile and the tread profile is a first side second reference point, a point of intersection of an extended line of the shoulder side arc and an extended line of the side portion arc on a second side is a second side first reference point, a point of intersection of a straight line passing through the second side first reference point perpendicular to the tread profile and the tread profile is a second side second reference point, a length along the tread profile from the first side second reference point to the second side second reference point is a developed tread width TDW, a point of intersection of a tire equatorial plane and the tread profile is a profile center, and an angle formed between a straight line that connects the second reference points and the profile center and a straight line parallel to the tire width direction is an amount of depression θ, relationships
0.8≦TDW/SW<11.5°≦θ≦4.5° are satisfied. |
