Patent classifications
B60C2009/209
Pneumatic tire
In a pneumatic tire provided with a carcass layer and a belt layer, the carcass layer is formed of an organic fiber cord having an elongation at break of 20% to 30%, an elongation in a sidewall portion under a load of 2.0 cN/dtex of 5.5% to 8.0%, and a product A=DEc of a fineness based on corrected mass D (unit: dtex/piece) and a count Ec (unit: piece/50 mm) of 1.810.sup.5 dtex/50 mm to 3.010.sup.5 dtex/50 mm, and the belt layer is formed of a steel cord having a stress at break of 3300 MPa or more and a product B=SEb of a cross-sectional area S (unit: mm.sup.2/piece), and a count Eb (unit: piece/50 mm) is from 6.0 mm.sup.2/50 mm to 7.5 mm.sup.2/50 mm.
Pneumatic vehicle tire having a reinforcing layer with steel monofilaments
A pneumatic vehicle tire having a strength member ply comprising steel monofilaments having a cross-sectional area of 98 mm.sup.2 to 125 mm.sup.2 per meter of strength member ply, the steel has a carbon content of at least 0.86% by weight. To improve rolling resistance the monofilaments have a brass coating having a copper content of 61% by weight to 70% by weight and a zinc content of 30% by weight to 39% by weight, in that the monofilaments have a linear density of 92 g/100 m to 105 g/100 m, and the monofilaments each have a tensile density Td of 34 MPa/(g/100 m) to 39 MPa/(g/100 m). The strength member ply has an areal strength AS of 109 Nmm.sup.2 to 166 Nmm.sup.2, and the rubber material has a breaking elongation of 300% to 450%.