The pneumatic tire includes a carcass layer, a belt layer disposed on an outer side of the carcass layer in a radial direction, and a tread rubber disposed on an outer side of the belt layer in the radial direction. Additionally, the carcass layer has a cord angle of 80° or more and 100° or less…
A hose for transportation of refrigerant includes an inner layer, a reinforcing layer, and an outer layer. The inner and outer layers each include a thermoplastic resin composition having a sea-island structure including a matrix containing a thermoplastic resin and a domain containing an…
A road surface condition determining method and a road surface condition determining device. A road surface condition determining method includes: a first step of acquiring over time a signal including information on acceleration, a strain rate, or strain output from a sensor disposed on an inner…
A pneumatic tire includes a bead core including end portions in a width direction formed as a vertical line along a radial direction, the vertical line has a length of 31% to 45% of a core height, in two adjacent bead core layers of first, second and third layers of the bead core, the number of…
In a tire, a middle land portion includes a first middle narrow groove having a linear shape or an arc shape and extending through the middle land portion and a second middle narrow groove having a Z-shape and extending through the middle land portion. A center land portion includes a first center…
A pneumatic tire includes: a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions…
A pneumatic tire includes: a pair of bead portions; at least one carcass layer extending between the pair of bead portions; a belt layer disposed on an outer side of the carcass layer in a tire radial direction; and a tire inner surface rubber layer constituting a tire inner surface. The tire…
Provided is a tire having a cross-sectional height (SH) ranging from 50 mm to 150 mm, in an unloaded state where the tire is mounted on a specified rim and inflated to a specified internal pressure, an opening distance (A) between the tire and a rim flange on a perpendicular line drawn from an…
A pneumatic tire includes inner intermediate lug grooves having a length L and outer intermediate lug grooves having a length L formed in inner and outer intermediate land portions, respectively, where lengths L and L satisfy L>L. Distances W, W, W, and W from a tire equator to an inner shoulder…
In a pneumatic tire, a bead core has end portions in a tirewidth direction formed as vertical lines along a tireradial direction. A length of the vertical lines is from 20% to 30% of a core height. In two adjacent bead core layers of first, second and third layers, the radial outer layer…
An air pressure management device includes: a temperature conversion air pressure calculation unit that calculates a temperature conversion air pressure based on acquired temperature and air pressure of a tire; an air pressure decrease rate calculation unit that calculates an air pressure decrease…
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 = D × Ec of a fineness based on…
In this tire, a distance GT from a tread profile at a tire ground contact edge to a tire inner surface, a distance GC from the tread profile at a position of 70% of a tire cross-sectional height to the tire inner surface, and a distance GD from the tread profile at a tire maximum width position to…
Provided is a rubber composition for a tire having excellent performance on snow, wet grip performance, and forming processability, while containing a large amount of silica. The rubber composition contains: in 100 parts by mass of a diene rubber containing from 25 to 50 mass % of a butadiene…
A pneumatic tire comprises circumferential main grooves extending in the tire circumferential direction and land portions defined by the circumferential main grooves. The land portions are each provided with a plurality of groove units which are sets including a first groove, a second groove, and a…
A pneumatic tire comprising a plurality of circumferential main grooves, and a land portion defined by a pair of the plurality of circumferential main grooves. The land portion comprises a plurality of first lug grooves, a plurality of second lug grooves that are wider than the first lug grooves…
A pneumatic tire comprises a plurality of protrusion portions extending along a tire side surface of a tire side portion in a direction that intersects a tire circumferential direction and a tire radial direction; the plurality of protrusion portions each including an intermediate portion in an…
In a pneumatic tire are defined: a first imaginary line VL passing through a ground contact surface in a meridian cross section of a tread portion, a second imaginary line VL passing through a bottom portion of a shoulder main groove and parallel to VL, an intersection point between VL and a…
A stud pin includes a tip including a tip end surface configured to come into contact with a road surface and a trunk portion that supports the tip and extends in one direction. The trunk portion includes an upper flange disposed at a first end of the trunk portion, the tip being fixed to the upper…
A pneumatic tire comprises a plurality of blocks arranged on a tire ground contact edge. The plurality of blocks each comprise at least one main sipe that comprises: a two-dimensional sipe portion extending in a tire circumferential direction, and a three-dimensional sipe portion extending in a…