In a pneumatic tire in which a reinforcing layer including a cord is embedded, a coating rubber covering the cord included in the reinforcing layer uses a rubber composition in which 30 parts by mass to 60 parts by mass of carbon black having a nitrogen adsorption specific surface area N.sub.2SA of 100 m.sup.2/g or more and 0 parts by mass or more and 10 parts by mass or less of aroma oil is optionally blended, per 100 parts by mass of a rubber component containing 70 mass % to 100 mass % of a natural rubber and in which a strength at break TB (unit: MPa) at 100° C. and a stress M100 (unit: MPa) at 100% elongation at 100° C. satisfy a relationship TB.sup.2/M100≥50.0.

The present invention relates to a resin composition including a modified petroleum resin having a structure in which a molecular weight regulator is bonded to at least one terminus of both terminuses of an at least partially hydrogenated or non-hydrogenated petroleum resin, and a viscosity of the resin composition measured at a temperature of 25° C. is in a range of 5,000 cps to less than 50,000 cps.

A wheel includes a rim and a wheel center interconnected to the rim. The wheel center includes at least one spoke extending from a wheel hub to the rim in a radial direction. The rim includes per the at least one spoke a first contact area and the at least one spoke includes at its outer end a second contact area which in a mounted position is aligned to the first contact area. The at least one spoke includes at least one hollow space extending in the radial direction of the spoke.

A wheel assembly including a rim including a first rim hole extending through an inner surface and an outer surface of a rim at a first angle, the first angle being defined with respect to a center line through the wheel in a direction of travel at the location of the first rim hole and with respect to an axis radially normal to the rim, the first angle having a non-zero first component relative to the center line and a non-zero second component relative to the radially normal axis, a hub including a first hub hole, the first hub hole being formed at the first angle such that the first rim hole and the first hub hole are co-axial, and a first spoke extending between the first rim hole and the first hub hole, the first spoke being co-axial with the first rim hole and the first hub hole.

A tyre includes a tread portion provided with a circumferential groove and a lateral groove. The at least one lateral groove includes a connected portion connected to the circumferential groove. The circumferential groove includes a groove bottom provided with groove bottom protruding portions protruding outwardly in the tyre radial direction. Each groove bottom protruding portion includes a first surface portion extending in the tyre radial direction and facing a first circumferential direction, and a second surface portion arranged on a second circumferential direction opposite to the first circumferential direction and extending at a larger angle with respect to the tyre radial direction than that of the first surface portion. In a tread plan view, at least a part of the groove bottom protruding portions is located in a lateral-groove extended region in which the connected portion is extended into the circumferential groove along the tyre axial direction.

The invention relates to a wheel, especially for motor vehicles, comprising a wheel rim and a wheel disc, the wheel rim having a rim base made of fiber composite material. The invention is characterized in that the wheel disc (3, 11, 20, 29, 40) can be indirectly connected to the wheel rim (1), in particular the rim base (2), by means of a connecting element (5, 14, 22, 31, 35, 42) which is designed and associated with the rim base (2) in such a way that the connected wheel disc (3, 11, 20, 29, 40) is not in contact with the rim base (2).

A tyre includes a tread portion including a shoulder land portion which has a tread edge and an axial outer surface extending radially inwardly from the tread edge. The shoulder land portion is provided with shoulder lateral grooves extending inwardly in the tyre axial direction from the tread edge to define shoulder blocks therebetween, and protrusions protruding outwardly in the tyre axial direction from the outer surface. The protrusion includes first protrusions each provided on the respective shoulder blocks and extending in the tyre radial direction, and second protrusions connecting radially inner ends of adjacent two first protrusions such that first bent portions are formed between the second protrusions and the first protrusions. The first protrusions have widths smaller than maximum length in the tyre circumferential direction of the respective shoulder blocks, and the second protrusions have widths smaller than the width of the first protrusions.

A tapered roller bearing includes an inner ring having a tapered raceway surface and a large-collar surface on a large-diameter side of the raceway surface, and tapered rollers. Each of the rollers has a large end surface guided by the large-collar surface. When R represents a set curvature radius of the large end surface and R.sub.BASE represents a base curvature radius from a vertex of a cone angle of each of the tapered rollers to the large-collar surface, the base curvature radius R.sub.BASE is 100 mm or less, and a ratio R/R.sub.BASE of the set curvature radius R to the base curvature radius R.sub.BASE is set to 0.90 or less. When R.sub.ACTUAL represents an actual curvature radius of the large end surface of each of the tapered rollers, a ratio R.sub.ACTUAL/R of the actual curvature radius R.sub.ACTUAL to the set curvature radius R exceeds 0.5.

An object of the present invention is to provide a rubber composition for a tread which is good in the balance between its wet grip performance and its chipping resistance. The rubber composition for a tread comprises 1 to 20 parts by mass of an ethylene-propylene-styrene copolymer and 60 parts by mass or more of a filler comprising a silica based on 100 parts by mass of a rubber component comprising 20 to 50% by mass of a butadiene rubber and 30 to 80% by mass of a styrene butadiene rubber, wherein an elongation at break of the rubber composition is not less than 300% in the atmosphere of 180° C. according to JIS K 6251: 2017.

A tire includes, in a tread portion, a pair of shoulder main grooves, a crown region between the shoulder main grooves, and shoulder regions disposed outside of the shoulder main grooves in a tire axial direction. Land ratios of the crown region and the shoulder regions are respectively 40%-60%. In the crown region, a plurality of middle blocks are arranged on both sides of a tire equator, and each middle block has a longitudinal shape in which a length in the tire circumferential direction is larger than a length in the tire axial direction.