Abstract: An aircraft tire management system includes a management device capable of communicating with a tire manufacturer, an MRO-providing company, and an airline through a network, and an acquisition device configured to acquire tire individual information on aircraft tires and wheel individual information on wheels. The acquisition device sends the tire individual information acquired in the tire manufacturer to the management device, sends the tire individual information and the wheel individual information on each aircraft tire fitted on the corresponding wheel acquired in the MRO-providing company to the management device, and sends the wheel individual information acquired in the airline to the management device. The management device links the tire individual information with the wheel individual information, and outputs tire management information including at least tire identification information, location information, and date and time information.

Abstract: An aircraft tire management system includes a management device capable of communicating with a tire manufacturer, an MRO-providing company, and an airline through a network, and an acquisition device configured to acquire tire individual information on aircraft tires and wheel individual information on wheels. The acquisition device sends the tire individual information acquired in the tire manufacturer to the management device, sends the tire individual information and the wheel individual information on each aircraft tire fitted on the corresponding wheel acquired in the MRO-providing company to the management device, and sends the wheel individual information acquired in the airline to the management device. The management device links the tire individual information with the wheel individual information, and outputs tire management information including at least tire identification information, location information, and date and time information.

Abstract: Driving stability and durability is efficiently improved. Since a protecting layer 43 embedded with reinforcing cords 41 is disposed between a tread 35 and a belt reinforcing layer 31, both of the protecting layer 43 and the belt reinforcing layer 31 decentrally bear a large bending force generated when a pneumatic tire 11 runs on a sharp projection or a difference in level. As a result, even if reinforcing elements 33 in the belt reinforcing layer 31 are extended by large tension due to fill internal pressure, increase of strain generated in the reinforcing elements 33 can be effectively suppressed.

Abstract: A pneumatic tire for motorcycles includes a carcass extending toroidally between a pair of bead portions, at least one ply of a belt layer installed outside thereof in the tire radial direction, and a tread portion radially outside the belt layer. In the tread portion, the 50% region of the developed width of the tread whose center is on the tire equatorial plane is a “tread center portion”, the 25% regions of the developed width of the tread region on either side of the tread center portion are a “tread side portion”, and each tread side portion is divided into three equal parts in the tire width direction defined from the tread end in order as regions A, B and C. The average modulus of elasticity in region B at 100% elongation at 40° C. is larger than the average modulus of elasticity in region A and in region C at 100% elongation at 40° C.

Abstract: The present invention aims to provide a pneumatic tire for a motorcycle capable of improving turning performance on a wet road surface as compared to that of conventional tires. The pneumatic tire for a motorcycle comprises a tread 28 consisting of a tread central portion having a width of 60% of a tread developed width and tread side portions located outside of the tread central portion in the width direction of the tire and a plurality of wide inclined grooves 42 and narrow inclined grooves 44 inclined at an angle of less than 90 degrees with respect to the circumferential direction of the tire formed in the tread side portion such that the grooves continuously extend over a region of 50% or more of a width of the tread side portion. A groove width of the narrow inclined grooves 44 is set within a range between 0.3 mm and 2.5 mm. A total area of the wide inclined grooves 42 is set to not more than 20% of an area of the tread side portion.

Abstract: The pneumatic tire for two-wheeled vehicles including a plurality of tread rubbers constituting a tread wherein a region occupying 15 to 35% in the center of a stretched tread width, which is obtained by stretching the tread with respect to a tire equatorial plane as the center, is defined as a tread central section; the remaining regions at both ends are defined as tread side sections; regions in the respective tread side sections each occupying 4 to 13% from the corresponding tread end toward the center of the stretched tread width are defined as side-section shoulder-end regions; and the remaining regions of the respective tread side sections are defined as side-section near-center regions, a modulus of the tread rubbers for the side-section shoulder-end regions at 100% elongation is smaller than a modulus of the tread rubbers for the side-section near-center regions at 100% elongation, at least at a tread surface.

Abstract: A pneumatic tire 1 having a toroidal carcass 3 and a belt 7 consisting of belt layers 5, 6 arranged in the outer circumferential side of a crown portion 4 of the carcass 3. Between the adjacent belt layers 5, 6, the cords 8, 9 are crossed with each other with respect to an equatorial plane E of the tire to form cross belt layers. The widest belt layer 6 is a folded belt layer having a body portion 10 and a folded portion 12. A cord 9 constituting the folded belt layer 6 is an organic fiber cord. A narrow belt reinforcing layer 14 of rubberized cords 13 is arranged at least immediately below the width terminal end 11 of the body portion 10 of the folded belt layer 6 which terminal end 11 abuts on the folded portion 12.

Abstract: A pneumatic tire for a motorcycle in which partial abrasion is suppressed by making the slip component of a tread lubber in the circumferential direction of tire as uniform as possible in the ground contacting plane. A cushion rubber layer 38 having elastic modulus lower than that of the tread rubber 30 is arranged on a spiral belt layer 22, and an inclination belt layer 24 including a cord inclining at an angle of 45 to 90 degrees to the circumferential direction of the tire is arranged on the cushion rubber layer 38. Consequently, shear deformation of the cushion rubber layer 38 during traveling can be transmitted to the tread rubber 30 after being smoothed by the inclination belt layer 24.

Abstract: Since a protecting layer 43 embedded with reinforcing cords 41 is disposed between a tread 35 and a belt reinforcing layer 31, both of the protecting layer 43 and the belt reinforcing layer 31 decentrally bear a large bending force generated when a pneumatic tire 11 runs on a sharp projection or a difference in level. As a result, even if reinforcing elements 33 in the belt reinforcing layer 31 are extended by large tension due to fill internal pressure, increase of strain generated in the reinforcing elements 33 can be effectively suppressed.

Abstract: This invention provides a pneumatic tire for a two-wheeled vehicle with improved lateral grip at cornering, controlled tread wear in the shoulder regions, ensured uniformity of wear on the left and the right, and secured heat generation in the tread on an actual vehicle. The pneumatic tire has left and right dissimilar rubber layers (15b, 15c) disposed in an inner layer of the tread in the left and right shoulder regions (16), respectively.

Abstract: A pneumatic tire for motorcycles is provided which can improve traction performance especially during sharp cornering by largely leaning a vehicle, and stability during leaning of a vehicle without diminishing other performances. A pneumatic tire for motorcycles having a tread portion 11 formed in a circular shape, the tread portion 11 having a crown portion which has a spiral belt layer 3 in its inside in the radial direction of the tire, the spiral belt layer having an angle of 0 to 5° with respect to the circumferential direction of the tire and an arrangement width 0.5 to 0.8 times as large as the tread width, wherein the spiral belt layer 3 is split into three in the transverse direction and the tensile elastic modulus of the cord constituting the region at the both edges of said spiral belt layer 3 split into three is lower than that of the cord constituting the central region.

Abstract: The present invention aims to provide a pneumatic tire for a motorcycle further improving driving stability especially in turning. A pneumatic tire 10 for a motorcycle comprises a pair of right and left bead portions 12 and a carcass layer 14 toroidally extending from the bead portions 12. In addition, the pneumatic tire 10 for a motorcycle comprises a spiral belt layer 20 on the radially inner side of a crown portion 14C of the carcass layer 14. This spiral belt layer 20 is formed by spirally winding a strip-shaped rubber-coated cord layer 21 consisting of a single cord or a plurality of parallel cords embedded in coating rubber in such a manner that a cord angle is within a range between 0 degree and 5 degrees with respect to a tire circumferential direction. This spiral belt layer 20 lies only in areas from a tire center CL to positions away from the tire center CL by 0.65L to 0.85L where L is a tread surface distance from the tire center CL to a tread edge T.

Abstract: In a pneumatic tire for a front wheel, turning performance on a wet road surface is improved compared with a conventional tire. In a pneumatic tire for a front wheel 10, a tread shoulder region 28S extends from a tread edge 20E toward a tire equatorial plane across a width of 20% of a developed width of a tread 28, and a land portion 56 defined by lateral portions 50 is disposed at the tread shoulder region 28S. Regarding the land portion 56, a wall surface 56K of the land portion at a trailing side is parallel to the tire radial direction; a wall surface 56H of the land portion at a leading side inclines from a groove bottom toward a groove opening, and an angle thereof relative to the tire radial direction is 35 degrees. It is effective especially for circumferential leaning deformation of the land portion 56 when braking force acts thereon, whereby lifting of an edge of the land portion at the leading side arisen from the tilting deformation can be suppressed.

Abstract: A belt reinforcement layer 16 disposed on a out side of a crossing belt 15 of the pneumatic tire across the full width of the crossing belt 15 comprises a first spiral reinforcement layer 17 covering the crossing belt 15 in wide range as a tread center portion is a center, being narrower than a tread width and being composed of an aromatic polyamide, a second spiral reinforcement layer 18 covering both end of two belt layer 15a and 15b of the crossing belt 15 and having a cord that a diameter thereof composed of a nylon is finer than a cord of the first spiral reinforcement layer 17 and a overlap portion 18z that a reinforcement layer overlaps is provided on a part of the second spiral reinforcement layer 18 so that separation between the belt layer and belt reinforcement layer can be controlled strongly and effective hoop effect is exhibited at the tread end portion so as to improve driving stability and durability at high-speed driving.

Abstract: A pneumatic tire for motorcycles is provided in which wear resistance is assured and the steering stability at a turn is improved as compared with the conventional tire by improving a grip ability. The pneumatic tire for motorcycles comprises a carcass 2 extending toroidally between a pair of bead portions, at least one ply of belt layer 3 installed outside thereof in the direction of the radius of the tire, and a tread portion placed outside of the belt layer in the direction of the radius of the tire.

Abstract: A pneumatic tire for a two-wheeled vehicle has further increased driving stability, particularly in turning. Pneumatic tire 10 for a two-wheeled vehicle has belt layer 16 and tread section 18 that are sequentially arranged on the outer side, in the radial direction of the tire, of a crown section 14C of a carcass 14. On the belt layer 16 is placed a spiral belt layer 20 formed by spirally winding a band-like rubber coated cord layer so as to form a cord angle in the range of 0° to 5° relative to the circumferential direction of the tire. With L the tread surface distance from tire center CL to tread edge T, spiral belt layer 20 is present only in the range of 0.65 L to 0.85 L from tire center CL, and intersecting belt layers 22A-22D are arranged in the range of from an edge in the lateral direction of the spiral belt layer 20 to tread edge T.

Abstract: The ground contact pressure on land portions 44 is uniformed so that drivability is improved and uneven wear is suppressed to improve wear resistance. The parts of the carcass layer 28 and belt layer 33 overlapping with the main grooves 42 are convexly curved toward the outside in the radial direction due to the internal pressure. The reinforcing layer 49 is arranged at the position spaced from the neutral axis of deformation in the compressed side in a certain distance, i.e. radially inside of the radially outermost carcass ply 30, and the steel cords 47 which extend in the direction including the tire width direction and its approximate direction and which act as supports for resisting against the compression force are embedded in the reinforcing layer. As a result, the above-mentioned curved deformation can be effectively suppressed.

Abstract: The present invention aims to provide a pneumatic tire for a motorcycle capable of improving turning performance on a wet road surface as compared to that of conventional tires. The pneumatic tire for a motorcycle comprises a tread 28 consisting of a tread central portion having a width of 60% of a tread developed width and tread side portions located outside of the tread central portion in the width direction of the tire and a plurality of wide inclined grooves 42 and narrow inclined grooves 44 inclined at an angle of less than 90 degrees with respect to the circumferential direction of the tire formed in the tread side portion such that the grooves continuously extend over a region of 50% or more of a width of the tread side portion. A groove width of the narrow inclined grooves 44 is set within a range between 0.3 mm and 2.5 mm. A total area of the wide inclined grooves 42 is set to not more than 20% of an area of the tread side portion.

Abstract: A pneumatic tire for two-wheeled vehicles that has excellent steering stability during high-speed traveling while having excellent steering stability performance during turning, in which the vehicle body is significantly tilted, with improved grip performance during turning. The pneumatic tire for two-wheeled vehicles includes a spiral belt layer (22) and a plurality of tread rubbers constituting a tread (28).

Abstract: A pneumatic tire for a motorcycle in which partial abrasion is suppressed by making the slip component of a tread lubber in the circumferential direction of tire as uniform as possible in the ground contacting plane. A cushion rubber layer 38 having elastic modulus lower than that of the tread rubber 30 is arranged on a spiral belt layer 22, and an inclination belt layer 24 including a cord inclining at an angle of 45 to 90 degrees to the circumferential direction of the tire is arranged on the cushion rubber layer 38. Consequently, shear deformation of the cushion rubber layer 38 during traveling can be transmitted to the tread rubber 30 after being smoothed by the inclination belt layer 24.