A tire includes a first circumferential main groove 11 and a second circumferential main groove 12 in a tread surface 1. A resonator 21 is formed in an intermediate land portion 20 partitioned between the first circumferential main groove and the second circumferential main groove. The resonator has an auxiliary groove 211 whose both ends terminate within the intermediate land portion. The groove depths D1 of the first and second circumferential main grooves are 50% or less of the groove widths W2 of the first and second circumferential main grooves, respectively. The groove depth D3 of the auxiliary groove of the resonator is 70% or more of the groove depth D1 of the first circumferential main groove.

An object of the present invention is to provide a tire having improved overall performance of grip performance during straight running and grip performance during cornering under a high-speed running condition.

As a result of intensive studies, it has been found that the above-described problem can be solved by, in a tire having a tread part in which a mounting direction to a vehicle is designated, dividing the tread part in a tire width direction and setting respective width and respective average values of a loss tangent tan δ of an inner tread rubber layer forming an end side inside the to vehicle when the tire is mounted to the vehicle and an outer tread rubber layer forming an end side outside the vehicle when the tire is mounted to the vehicle within predetermined ranges.

A pneumatic tire that specifies the tire mounting direction when mounted on a vehicle and has sufficiently improved grip performance at high-speed turning is provided in which the cap rubber layer on the outermost layer of the tread is divided in the tire width direction, the cap rubber layer located on the outside of the vehicle is formed of a rubber composition containing 25% by mass or less of styrene in the rubber component and having a glass transition temperature of −18° C. or higher, and, when the carbon black content ratio is C.sub.OUT (mass %), and the ground contact area ratio is L.sub.OUT, in the cap rubber layer located on the outside of the vehicle, and the carbon black content ratio is C.sub.IN (mass %) and the ground contact area ratio is L.sub.IN in the cap rubber layer located inside the vehicle, the following (Formula 1) and (Formula 2) are satisfied.

C.sub.IN<C.sub.OUT  (Formula 1)

0≤(C.sub.OUT×L.sub.OUT)−(C.sub.IN×L.sub.IN)  (Formula 2)

A pneumatic tire comprises a tread portion provided with a pair of crown main grooves and a pair shoulder main grooves to divide middle portions and shoulder portions, the tread portion having a contact surface covered with a cap rubber layer with a loss tangent of from 0.03 to 0.18, the middle portions provided with only middle lug grooves with groove widths within 2 mm, each middle lug groove extending from one end connected either the crown or shoulder main groove to the other end terminating within the middle portion, the middle lug grooves having an angle of from 40 to 55 degrees with respect to a tire circumferential direction, and each shoulder portion provided with first shoulder lateral grooves having axially inner ends connected to the shoulder main groove, wherein first shoulder lateral grooves consist of grooves having groove widths within 2 mm.

A tire having high on-ice starting performance, the tire is provided with a plurality of circumferential direction grooves formed on a tread of the tire and extending in a tire circumferential direction, a plurality of width direction grooves extending in a direction intersecting the tire circumferential direction, a plurality of blocks demarcated by the circumferential direction grooves and the width direction grooves, and a plurality of width direction sipes formed on surfaces of the blocks and extending in the direction intersecting the tire circumferential direction, in which a distance P between the sipes 18z is set in a range of 4-12 mm.

Provided is a pneumatic tire. Distances from a tire equator of the first to third main grooves and narrow groove respectively are from 5% to 20%, 20% to 35%, 55% to 70%, and 40% to 60% of a tire ground contact half-width TL/2. First lug grooves reach a ground contact edge on a vehicle inner side and terminate within a first rib, second lug grooves communicate with the third main groove and terminate in a second rib, third lug grooves communicate with the second main groove and terminate within a third rib, fourth lug grooves communicate with the first main groove and terminate within a fourth rib, fifth lug grooves intersect the narrow groove and terminate within the fourth rib and a fifth rib, and sixth lug grooves reach a ground contact edge on the vehicle outer side and terminate within the fifth rib.

A pair of motor vehicle tires includes a front tire and a rear tire to be mounted respectively on a front wheel and a rear wheel of a two-wheeled vehicle, each tire of the pair having a tread band extending around an axis of rotation. The tread band of the front tire includes a central annular portion straddling an equatorial plane and two annular shoulder portions disposed on axially opposite sides of the central annular portion. The central annular portion includes at least a pair of first grooves extending substantially longitudinally on opposite sides of the equatorial plane in such a way as to form a concavity directed toward the equatorial plane. Each shoulder portion includes a plurality of second grooves isolated from the first grooves and extending substantially transversally so as to form an average inclination with the equatorial plane greater than 90°. The tread band of the rear tire includes instead a module which is replicated along a direction of circumferential development of the tire, the module including: at least one first pair of first grooves inclined in opposite directions with respect to the equatorial plane of the tire; each first groove of the first pair extending along a portion of the tread band between the equatorial plane and a respective shoulder and forming an average inclination less than 60° with the equatorial plane.

A pneumatic tire tread pattern includes, on a first side in a width direction relative to a tire centerline, first lug grooves in a shoulder land portion extending from an outer side in the width direction toward and connecting with a shoulder side main groove; and second lug grooves in a middle land portion between the shoulder side main groove and a center side main groove, the second lug grooves extending from a portion of the shoulder side main groove between connection positions of circumferentially adjacent first lug grooves with the shoulder side main groove, toward the center side main groove, and being closed within the middle land portion. The first lug grooves are inclined, at the connection position, to one side in the circumferential direction relative to the width direction. The second lug grooves are inclined to be parallel with an inclination direction of the first lug groove.

Disclosed herein is an example of a tire, and arrangements of multiple tires for a heavy goods vehicle having a tread provided on one side of the equatorial median plane with a sculpture of a first kind and on the other side of the equatorial median plane with a sculpture of a second kind, the first kind of sculpture comprising at least three grooves of generally circumferential orientation. The tired disclosed herein is provided to avoid having to change tires at the change of season, notably of the arrival of winter, on a heavy goods vehicle and more particularly on the drive axles of the said vehicle for which these changes require additional work.

A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre.