Tire
AssigneeBridgestone Corporation
InventorIsao Kuwayama
Life of this patent
Estimating the term…
Abstract
A passenger vehicle pneumatic tire comprising: a carcass; and inclined belt layers and a circumferential belt layer, wherein: the inclined belt layers include at least two inclined belt layers having different tire widthwise widths; an inclination angle θ1 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the widest width and an inclination angle θ2 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the narrowest width satisfy correlations that 30°≤θ1≤85°, 10°≤θ2≤30°, and θ1>θ2; and a tire widthwise width W1 of the inclined belt layer having the widest width and a tire widthwise width W2 of the inclined belt layer having the narrowest width satisfy a correlation that W2≤0.6W1.
Claims6
A passenger car pneumatic radial tire comprising:
- a carcass toroidally extending between a pair of bead portions;
- and
- inclined belt layers having cords inclined with respect to a tire circumferential direction and a circumferential belt layer having cords extending along the tire circumferential direction or inclined with respect to the tire circumferential direction at an angle of 5° or less, the inclined belt layers and the circumferential belt layer being disposed on a tire radial outer side of a crown portion of the carcass, wherein:
- the inclined belt layers include at least two inclined belt layers having different tire widthwise widths;
- an inclination angle θ1 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the widest width and an inclination angle θ2 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the narrowest width satisfy correlations that
- 30°≤θ1≤85°,
- 10°≤θ2≤30°, and
- θ1>θ2;
- a tire widthwise width W1 of the inclined belt layer having the widest width and a tire widthwise width W2 of the inclined belt layer having the narrowest width satisfy a correlation that
- W2≤0.6W1;
- when the internal pressure of the tire is 250 kPa or more, a ratio of a sectional width SW to an outer diameter OD of the tire is 0.26 in the case where the sectional width SW of the tire is less than 165 mm, and the sectional width SW and an outer diameter OD of the tire satisfy a relation expression that OD≥2.135×SW+282.3 in the case where the sectional width SW of the tire is 165 mm or more,
- the inclined belt layers consist of only the widest-width inclined belt layer and the narrowest-width inclined belt layer, and
- the tire widthwise width W3 of the circumferential belt layer is 90% or more and 115% or less of a tread width TW.
Dependencies are inferred from the claim text.