Pneumatic radial tire for passenger caps
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTomohiko Kogure, Yoshiaki Hashimura
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Abstract
A pneumatic radial tire for passenger cars having a plurality of grooves formed in the tread and extending at least circumferentially of the tire, the tread being provided with two belt plies therein. The grooves have a depth in the range of 6.0 to 8.5 mm, with the thickness of the under-groove rubber layer from the bottom of the grooves to the outer belt ply being fixed within the range of 0.5 to 2.5 mm. The belt plies are both made from aramid fiber cords, or either belt ply is made from aramid fiber cords and the other ply from steel cords. The both edge portions of at least one of the belt plies are folded back toward the center of the tread at a fold percentage of 8 to 100 percent.
Claims12
A pneumatic radial tire for passenger cars having a plurality of grooves formed in the tread and extending at least circumferentially of the tire, the tread being provided with two belt plies therein, said grooves having a depth in the range of 6.0 to 8.5 mm, with the thickness of the under-groove rubber layer from the bottom of the grooves to the cord surface of the outer belt ply being fixed within the range of 0.5 to 2.0 mm, said belt plies being both made from aramid fiber cords, with the both edge portions of at least one of said belt plies being folded back toward the center of the tread at a fold percentage of 8 to 100 percent, said belt plies forming cord angles of 5.degree. to 40.degree. to the circumferential direction of the tire.
A pneumatic radial tire for passenger cars having a plurality of grooves formed in the tread and extending at least circumferentially of the tire, the tread being provided with two belt plies therein, said grooves having a depth in the range of 6.0 to 8.5 mm, with the thickness of the under-groove rubber layer from the bottom of the grooves to the cord surface of the outer belt ply being fixed within the range of 0.5 to 2.0 mm, one of said belt plies being made from aramid fiber cords and the other ply from steel cords, said belt plies forming cord angles of 5.degree.-40.degree. to the circumferential direction of the tire, with the both edge portions of at least one of said belt plies being folded back toward the center of the tread at a fold percentage of 8 to 100 percent.
Dependencies are inferred from the claim text.