High-durable pneumatic radial tires
AssigneeBridgestone Tire Company Limited
InventorsTakao Ogino, Yoichi Watanabe, Shigehisa Sano
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Abstract
A high-durable pneumatic radial tire is disclosed. In the tire of this type, steel cords each made from particular steel filaments are used in at least one of belt and carcass. This steel filament has a pearlite structure having an average value of interlamellar distance between cementites of 300-500 .ANG., and a tensile strength of not less than 220 kgf/mm.sup.2.
Claims2
In a high-durable pneumatic radial tire comprising a tread portion, a pair of side portions extending from said tread portion, a pair of bead portions extending from said side portions and a carcass reinforced with a belt embedded in said tread portion, the improvement wherein steel cords each obtained by twisting plural steel filaments with a pearlite structure having an average value of interlamellar distance between cementites of 300-500 .ANG. and a tensile strength of not less than 220 kg/mm.sup.2 are used in at least one of said belt and carcass.
Dependencies are inferred from the claim text.