The Yokohama Rubber Co., Ltd.

Hikomitsu Noji

Masaki Noro

Ichiro Akiyama

Kohtaroh Iwabuchi

Shinichi Mori

Mitsutoshi Saeki

Motohide Takasugi

Naoyuki Katsura

Issey Nakakita

Yasujiro Daisho

Masakuni Kawamura

Mituo Kurebayashi

Pneumatic tire and assembly of tire and wheel

A pneumatic radial tire in which both end portions of a plurality of carcass plies are mounted respectively to left and right bead cores to fold back from an inner side to an outer side of the tire. Fold back portions of the carcass plies constituting the outermost sides on inner sides of the bead cores are laminated onto unfolded portions of the carcass plies. Carcass cords of the carcass plies are intersected with each other between the laminated layers. A length of the fold back portion is longer than any of fold back portions of the remaining carcass plies.

Pneumatic radial tire including a plurality of carcass plies with specified fold back portions

A pneumatic radial tire having carcass layers of three plies each constituted by organic fiber cords and in which both end portions of a first one and a second one of the carcass layers enumerated from an inner side to an outer side direction of the tire in the 3 plies of carcass layers, are folded back from the inner side to the outer side of the tire respectively around bead cores, reinforcement layers are arranged on outer sides of the fold back portions of the carcass layers and a third one of the carcass layers is turned down to cover outer sides of the reinforcement layers.

Pneumatic radial tire with turned down carcass layer

Pneumatic tire and pneumatic tire set

Automobile tire

At least one reinforcing rubber layer is provided in the part of each of two side wall portions which is on the outer side of a carcass layer. The outer circumferential end portions of the reinforcing rubber layers extend to positions in which they are disposed between the end portions of the innermost belt layer and the corresponding portions of the carcass layer, while the inner circumferential end portions of these rubber layers extend inward in the radial direction of the tire so as to overlap the bead fillers in positions on the outer sides of the end portions of the carcass layer in the widthwise direction of the tire. A 100% modulus at 100.degree. C. of the rubber constituting the reinforcing rubber layers is not higher than that of the rubber of the belt layers, and a dynamic elastic modulus at 20.degree. C. of the former rubber in the range of 10-40 MPa. The thickness of the portions of the reinforcing rubber layers which are between the edges of the innermost belt layer and the outer circumferential ends of the bead fillers is set securely to not less than 1.00 mm, and the thickness of the parts of the side wall portions which are on the tire outer sides of the reinforcing rubber layers also not less than 1.00 mm.

Pneumatic tire with sidewall reinforcing rubber layer

A pneumatic tire wherein an end portion of a carcass layer is turned up from inside to outside of the tire around each bead core up to a buttress portion, and this turn-up end portion is clamped between a belt edge cushion rubber and an under-tread rubber.

Pneumatic tire with carcass turnup between belt edge cushion rubber and

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Hiratsuka, Japan

Hikomitsu Noji