Abstract: A 300% modulus at 100° C. in the range of 1 mm in an radial direction from a surface of a tread member is set to be between 1.10 times and 2.0 times inclusive, more preferably, between 1.10 times and 1.5 times inclusive, larger than a 300% modulus at 100° C. in the range of 0.5 mm to 1.5 mm in the radial direction from a bottom part of the tread member.

Abstract: This invention relates to a rubber composition capable of using in a tread rubber of a tire to improve both an initial gripping performance and a running stability of the tire as compared with those of conventional tires, and more particularly to a rubber composition formed by compounding an indene-containing C9-based resin having a softening point of 130° C.-190° C. and an indene content of 30-80 mass % into a rubber component.

Abstract: This invention relates to a rubber composition capable of using in a tread rubber of a tire to improve both an initial gripping performance and a running stability of the tire as compared with those of conventional tires, and more particularly to a rubber composition formed by compounding an indene-containing C9-based resin having a softening point of 130° C.-190° C. and an indene content of 30-80 mass % into a rubber component.

Abstract: A 300% modulus at 100° C. in the range of 1 mm in an axial direction from a surface of a tread member is set to be between 1.10 times and 2.0 times inclusive, more preferably, between 1.10 times and 1.5 times inclusive, larger than a 300% modulus at 100° C. in the range of 0.5 mm to 1.5 mm in the axial direction from a bottom part of the tread member.

Abstract: A rubber composition prepared by compounding 0.05 to 20 parts by weight of at least one selected from substituted hydrazide compounds represented by the following Formulas (I) to (IV) per 100 parts by weight of a rubber component comprising at least one rubber selected from the group consisting of natural rubber and synthetic rubber, and a pneumatic tire using the same: wherein A represents one selected from the group consisting of an aromatic group which may have a substituent, a hydantoin ring which may have a substituent, and a saturated or unsaturated linear hydrocarbon having 1 to 18 carbon atoms; Y represents hydrogen, an amino group, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an alkenyl group, an aromatic group, a pyridyl group or hydrazino group; and R1 to R11 each represent hydrogen, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group or an aromatic group.