Bridgestone Corporation

Sayaka Mishima

Kenji Toyoda

A circumferential recess is formed on the outer surface of a tire side section, the circumferential recess being depressed inward in a tread width direction and extending in a tire circumferential direction. In a cross section along the tread width direction of the tire and the tire radial direction, a rim-side outer surface formed in an area from a rim separation point, which is the outermost point in the tire radial direction that is in contact with a rim flange, to an inner end of the circumferential recess in the tire radial direction, is formed along a first arc curve having a center of a curvature radius on the inside in the tread width direction. In the cross section, a sidewall surface formed in an area from the inner end of the circumferential recess in the tire radial direction to a bottom surface of the circumferential recess is formed along a second arc curve having a center of a curvature radius on the outside in the tread width direction.

Tire

A circumferential recess is formed on the outer surface of a tire side section, the circumferential recess being recessed inward in a tread width direction and extending in a tire circumferential direction. A block protruding outward in the tread width direction is formed on the inside of the circumferential recess. In a cross section along the tread width direction of the tire and the tire radial direction, a rim outer surface is formed in an area from a rim separation point, which is the outermost point in the tire radial direction that is in contact with a rim flange, to an inner end of the circumferential recess in the tire radial direction. At least a part of the block protrudes further to the outside in the tread width direction than a virtual line along which the rim outer surface extends.

The disclosed pneumatic tire () comprises a stiffener () and a rubber pad () which, disposed between a toroidal carcass body () and a folded-back carcass portion () folded back at a bead core (), are arranged so as to be oriented radially outwards of the tire from the bead core (). Further, from the rim baseline (BL), the height KSH to the end (A) of the stiffener (), the height OWH to the maximum carcass width (W), and the height FH to the end (A) of the rim flange () fulfill 0.2&#x2266;[(KSH&#x2212;FH)/(OWH&#x2212;FH)]&#x2266;0.28.

Pneumatic tire

Circumferential recesses have: first blocks protruding outward in the tire tread width direction, the first blocks having radial outer end sections and radial inner front end sections; and second blocks protruding outward in the tire tread width direction, the second blocks having radial inner end sections and radial outer front end sections. The radial inner front end sections of the first blocks and the radial outer front end sections of the second blocks are separated from each other in the tire circumferential direction or in the tire radial direction.

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Kodaira, Japan

Sayaka Mishima