The tire for a construction plant vehicle includes a tread and a crown reinforcement arranged radially internal to the tread. The crown reinforcement includes a protective reinforcement, a working reinforcement, and a hoop reinforcement. The protective reinforcement includes at least one protective ply that exhibits a force at break Fm.sub.NSP. The working reinforcement includes at least one working ply that exhibits a force at break Fm.sub.NST. The hoop reinforcement includes at least one hooping ply, each of which includes hoop reinforcing elements that make an angle at most equal to 10 with a circumferential direction of the tire. The working reinforcement is arranged radially internal to the protective reinforcement. A ratio Fm.sub.NSP/Fm.sub.NST is greater than or equal to 0.27 and less than or equal to 0.90.

A tire includes a tread and a crown reinforcement arranged radially internal to the tread. The crown reinforcement includes a protective reinforcement and a working reinforcement. The protective reinforcement includes a protective ply that exhibits a force at break greater than or equal to 1300 daN.Math.cm.sup.1. The protective ply includes protective reinforcing elements, each of which exhibits a force at break greater than or equal to 3000 N. The working reinforcement is arranged radially internal to the protective reinforcement and includes a working ply. The working ply includes working reinforcing elements, each of which includes a working cord formed of at least a strand that includes an external layer of unsaturated threads.

The invention relates to a rubberized reinforcing ply (1) for articles consisting of an elastomeric material, preferably for vehicle tires, wherein the reinforcing ply (1) has a multiplicity of textile strengthening members (2) which are arranged parallel to and spaced apart from one another, wherein each textile strengthening member (2) is composed of at least one twisted multifilament yarn, and wherein the textile strengthening member (2) is not composed of the material rayon. The reinforcing ply (1) satisfies the following condition: (D.sup.2/E.sub.0) in mm corresponds to a value in a range from 0.22 mm to 0.38 mm, and the reinforcing ply (1) has a strength of >10 kN/dm, where D is the diameter of the textile strengthening member (2) in mm and lies in a range from 0.38 mm to 0.52 mm, and where E.sub.0=100/epdm.

A pneumatic tire comprises a carcass layer, a belt layer disposed on the outer side in the tire radial direction of the carcass layer, and tread rubber disposed on the outer side in the tire radial direction of the belt layer. The belt layer is formed by laminating a pair of cross belts having belt angles with an absolute value from 10 to 45 both inclusive and mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of 5 relative to the tire circumferential direction. The distance (Gcc) from the tread profile to the tire inner circumferential surface along the tire equatorial plane and the distance (Gsh) from the tread edge to the tire inner circumferential surface have a relationship satisfying 1.10Gsh/Gcc. The groove depth (Dsh) and under-groove gauge (UDsh) of the outermost circumferential main groove have a relationship satisfying 0.20UDsh/Dsh.

The invention provides a steel cord for rubber reinforcement. The steel cord comprises a core strand and at least three outer strands twisted around the core strand, the core strand comprises at least one first core filament and multiple first outer filaments twisted around the first core filament, each outer strand comprises a number of second filaments, at least one of multiple first outer filaments is preformed prior to being twisted into the core strand, and at least one of second steel filaments is straight prior to being twisted to form each outer strand. The steel cord has improved performance on core filament migration.

The invention relates to a rubberized reinforcing ply (1) for articles consisting of an elastomeric material, preferably for vehicle tires, wherein the reinforcing ply (1) has a multiplicity of textile strengthening members (2) which are arranged parallel to and spaced apart from one another, wherein each textile strengthening member (2) is composed of at least one twisted multifilament yarn composed of the material viscose. The reinforcing ply (1) satisfies the following condition: (D.sup.2/E.sub.0) in mm corresponds to a value in a range from 0.30 mm to 0.45 mm, and the reinforcing ply (1) has a strength of 11 kN/dm<x<20 kN/dm, where D is the diameter of the textile strengthening member (2) in mm and lies in a range from 0.38 mm to 0.48 mm, and where E.sub.0=100/epdm.

A pneumatic tire comprises a carcass layer, a belt layer disposed on the outer side in the tire radial direction of the carcass layer, and tread rubber disposed on the outer side in the tire radial direction of the belt layer. The belt layer is formed by laminating a pair of cross belts having belt angles with an absolute value from 10 to 45 both inclusive and mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of 5 relative to the tire circumferential direction. The distance (Gcc) from the tread profile to the tire inner circumferential surface along the tire equatorial plane and the distance (Gsh) from the tread edge to the tire inner circumferential surface have a relationship satisfying 1.10Gsh/Gcc. The groove depth (Dsh) and under-groove gauge (UDsh) of the outermost circumferential main groove have a relationship satisfying 0.20UDsh/Dsh.

A tire for a heavy construction-type vehicle includes a tread, a radial carcass reinforcement, and a crown reinforcement. The crown reinforcement includes a working reinforcement and a hoop reinforcement. The working reinforcement includes two working layers, each of which includes inelastic metallic reinforcers that are crossed from one layer to a next layer and that make an angle in a range of from 15 to 40 with respect to a circumferential direction. The hoop reinforcement, which is a ply that is wound circumferentially to form a radial stack of at least two hooping layers, includes circumferential elastic metallic reinforcers that make an angle equal to at most 2.5 with respect to the circumferential direction. The hoop reinforcement is radially positioned between the working layers, and the circumferential metallic reinforcers of the hoop reinforcement have a force at break equal to at least 800 daN.

A radial tire for a heavy vehicle of construction plant type, and aims to increase the resistance of the crown thereof to attack The tire (1) for a heavy vehicle of construction plant type has a crown reinforcement (3) radially on the inside of a tread (2) and radially on the outside of a carcass reinforcement (4), the crown reinforcement (3) has, radially from the outside to the inside, a protective reinforcement (5) and a working reinforcement (6). The protective reinforcement (5) has at least one protective layer (51, 52) comprising elastic metal reinforcers that have a breaking strength Fm and a section of diameter D and are spaced apart in pairs by a spacing P at least equal to the diameter D. According to the invention, the ratio A=(PD)/D is at least equal to 0.25 and at most equal to 1, the ratio B=(Fm/P)/1000 is at least equal to 1.1 and at most equal to 2, Fm being expressed in N and P being expressed in mm, and the elastic metal reinforcers of the protective layer (51, 52) are multistrand ropes of structure 1N comprising a single layer of N strands wound in a helix.

A bicycle tire at least includes a tread part provided to a ground contact surface of the bicycle tire and a carcass part provided inside the tread part. The bicycle tire also includes a reinforcing ply in at least one position selected from between the tread part 2 and the carcass part, inside the carcass part, and inside the tread part. The reinforcing ply at least includes a woven fabric made of polyvinyl alcohol-series fiber yarns. Each of the yarns includes a plurality of single fibers having an average fiber diameter of 45 m or smaller.