Pneumatic tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorRyohei TAKEMORI
Life of this patent
Estimating the term…
Abstract
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.
Claims6
A pneumatic tire, comprising:
- a tread portion extending in a tire circumferential direction and having an annular shape;
- a pair of sidewall portions disposed on both sides of the tread portion;
- and
- a pair of bead portions disposed on an inner side in a tire radial direction of the pair of sidewall portions, at least one carcass layer formed by arranging a plurality of carcass cords in a radial direction being mounted between the pair of bead portions,
- a tread development width TDW in the tread portion and a tire maximum width SW satisfying a relationship of 0.70≤TDW/SW≤0.75,
- in a tire meridian cross-section, when a profile line forming an outer surface of the sidewall portions comprises at least three arcs having mutually different radii of curvature, an end point of the tread development width TDW is a point P1, and an end point of a tread pattern on an outer surface of the sidewall portions is a point P2, a radius of curvature R1 of an arc from the point P1 to the point P2, a radius of curvature R2 of an arc from the point P2 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 satisfying a relationship of R1>R2>R3 in the profile line, and
- a height SDH in the tire radial direction from a bead heel of the bead portions to the tire maximum width position and a tire cross-sectional height SH satisfying a relationship of 0.47≤SDH/SH≤0.50.
Dependencies are inferred from the claim text.