Improve Wear Resistance of Tires

Rubber composition for tire treads that balances low rolling resistance and good wear resistance in heavy-load tires. The composition contains diene rubber with at least 50% natural or isoprene rubber, carbon black with a specific surface area of 80-150 m2/g, and silica with a specific surface area of 120-250 m2/g. The silica content relative to carbon black (silica/carbon black ratio) should be greater than 1.

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Rubber composition for tires with improved durability, heat resistance, and abrasion resistance when traveling on rough roads, especially for heavy-duty tires. The composition contains predominantly isoprene rubber (60% or more) along with a small amount (0.1-5.0 parts per 100 parts rubber) of a specific compound represented by formula (1). The composition also has a balance of 40-80 parts carbon black and 30% or less silica based on the total filler load. The low filler density, high isoprene rubber content, and specific compound improves durability and heat resistance without sacrificing abrasion resistance.

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Rubber composition that improves wear resistance and chipping resistance. The composition includes silica and zinc oxide, which have a specific relationship between CTAB specific surface area and DBP oil absorption, into rubber including isoprene rubber.

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Tire tread design with sipes that maintain performance as the tire wears. The tread has sipes with three different depths, forming three levels in the tread blocks. The shallowest sipes are at the top level and the deepest sipes are at the bottom level. This allows the sipes to maintain their biting edges and void volume as the tread wears down, improving wet and snow traction over the life of the tire. The staggered depth levels also prevent damage or tearing when the mold is removed from the tread during manufacturing.

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Tire construction for a motorcycle tire that provides improved turning performance and durability compared to conventional motorcycle tires. The tire has a tread reinforcing layer with specific belt and band ply orientations and widths. The inner belt ply has cords angled greater than 5 degrees to the tire circumferential direction. The outer belt ply has cords angled greater than 5 degrees but with a wider width than the inner belt ply. The band ply has cords angled less than or equal to 5 degrees. This combination of belt and band ply angles and widths optimizes cornering force distribution and reduces tire wear for improved turning performance and durability.

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A tire with zigzag sipes in the tread that allows for better traction on snow and ice when the tire is worn. The zigzag sipes have a changing amplitude from the sipe opening to the maximum depth, with the maximum amplitude not at the opening. This ensures that as the tire wears, the exposed sipe edges still provide biting edges for traction.

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A compound that improves the abrasion resistance of rubber compositions such as tires. The compound is a trisulfide with specific substitution patterns on the sulfur atoms.

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A tire with improved resistance to chipping on bad roads at high speed. The tire has a tread with one or more circumferential main grooves that bend and deviate at a bending point. The rubber composition of the tread has specific properties - tan delta at 20C of 0.30 or less, breaking strength at 175C times elongation at 175C divided by 2 equal to or greater than 600.

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Tire with improved grip on rocky and snow/mud surfaces while maintaining block durability. The tread has crown blocks with a chamfered outer edge surrounding the ground contact surface. The interior of the block has step-shaped bends in its cross-section. This design allows the blocks to shear through snow and mud for traction on soft surfaces, while also providing bending rigidity to improve durability.

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Tires with an improved sipe design that enhances wet and dry performance without sacrificing wear resistance. The sipes have chamfered edges and raised bottoms. The chamfers are shorter than the sipe length and overlap slightly. The maximum depth of the chamfered portion is between 0.2 to 0.5 times the sipe depth. The sipe width is constant from the chamfer end to the groove bottom. This design balances wet traction from the chamfers and dry stability from the sipe. It also maintains sipe rigidity and wear resistance.

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Tire with multilayer tread design that maintains grip on wet surfaces even when worn to legal limits. The tread has an intermediate layer between the base and outer layers. The modulus ratio between the base and intermediate layers is 7-25. The viscoelastic loss ratio between the intermediate and outer layers is at least 30%. The radial thickness ratio between the outer and intermediate layers is 3-10. By optimizing the properties of these three layers, the tire keeps wet grip performance as it wears. The intermediate layer properties transition between the base and outer layers to maintain key performance.

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Tire tread design that maintains cornering and traction performance as the tread wears. The tread has sipes with an outer sipe element in the outer tread region and multiple inner sipe elements in the inner tread region. The inner sipe elements have a component that extends circumferentially. As the tread wears, the circumferential component of the inner sipes becomes exposed. This maintains flexibility and biting edges in the worn tread, improving cornering and traction performance compared to traditional sipes that lose effectiveness as the tire wears.

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Polymer composition for tires that improves rolling resistance, wet grip, and wear compared to conventional low hysteresis polymers. The composition contains specific diene-based polymers. One polymer has low aromatic vinyl content and modification with a polar group having affinity for the filler. The other polymer has medium aromatic vinyl content, vinyl content, and peak molecular weight. This dual polymer system provides the desired low rolling resistance without sacrificing wet grip and wear performance.

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A pneumatic tire design with improved flat spot resistance and high-speed durability. The tire has an optimized belt layer construction and bead design. It features a band layer with separate inner radial bands in each tread land. The inner radial bands have edges set back from the nearest groove to reduce strain. This reduces flat spots from band deformation when parked. The tire also has shorter outer bead apex height to limit sidewall deformation. The optimized belt and bead design balance flat spot resistance with high-speed durability.

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Tire that suppresses early abrasion under a condition that a large force is applied for a long time during low-speed running and improves abrasion resistance. The tire comprises a tread, a first layer whose outer surface constitutes a tread surface, a second layer located on the innermost side in a tire radial direction, and a filler that comprises particulate carbon black and silica, wherein an average primary particle size of the particulate carbon black is 19 nm or less.

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Tire rubber compositions with improved wear resistance without sacrificing rolling resistance. The compositions use a reinforcing filler predominantly comprising a filler covered at least partially by silica, like silica-coated carbon black. The filler dispersion in the rubber matrix is optimized to be uniform without using a coupling agent. The compositions also minimize plasticizers. Removing coupling agents and plasticizers improves the reinforcing properties of silica-covered fillers for improved tire wear.

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A rubber composition for tire tread that balances rolling resistance, wet road braking, and wear performance. It uses silica as a filler to disperse well and improve wet grip. To balance rolling resistance, it contains a low molecular weight neodymium-catalyzed butadiene rubber with narrow chain distribution. The composition also includes lithium catalyst butadiene rubber for improved rolling resistance and wear. The specific filler ratios are: 5-50 parts silica, 5-50 parts carbon black, 10-30 parts styrene-butadiene rubber or 10-30 parts neodymium-catalyzed butadiene rubber, and 10-20 parts lithium catalyst butadiene rubber.

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Tire design with zigzag sipes in tread blocks to improve tire life and wet performance. The sipes have specific dimensions and angles to optimize performance. The zigzag sipes have a wavelength and amplitude that oscillate while maintaining the zigzag shape. The sipes also have a slope angle and orientation relative to the tire axial direction. This zigzag pattern allows the sipes to engage and enhance block rigidity during cornering, reducing block deformation and wear. The optimized zigzag sipes balance block stiffness for longer life with wet grip by allowing sipe flexure.

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Tire rubber composition that can improve the overall performance of wear resistance during high-speed running and steering stability maintenance performance during repeated running. The composition includes a styrene-butadiene rubber, silica, carbon black, and a plasticizer containing a liquid polymer, wherein the silica content is greater than 25 parts by mass with respect to 100 parts by mass of the rubber component.

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Rubber composition for a tire that improves the overall performance of wear resistance and steering stability during high-speed running. The composition includes a rubber component containing butadiene rubber and styrene-butadiene rubber, a filler containing silica, and a plasticizer containing a resin, wherein the acetone extraction amount is less than 21% by mass, and the silica content.

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