Patent ID: 11932058
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 15:
16. A tire comprising:
a tread portion, the tread portion including a plurality of circumferential grooves continuously extending in a tire circumferential direction between a first tread end and a second tread end, and a plurality of land portions demarcated by the plurality of circumferential grooves,
the plurality of land portions include one middle land portion between the first tread end and a tire equator,
the middle land portion includes a plurality of middle blocks demarcated by a plurality of middle lateral grooves fully traversing the middle land portion in a tire axial direction,
at least one of the middle lateral grooves includes a first middle tie bar raised at a groove bottom portion at an end portion on an outer side in the tire axial direction thereof, and a second middle tie bar raised at the groove bottom portion at an end portion on an inner side in the tire axial direction thereof,
the plurality of middle blocks each includes a ground-contact surface, a first middle circumferential edge extending in the tire circumferential direction on the outer side in the tire axial direction of the ground-contact surface, and a second middle circumferential edge extending in the tire circumferential direction on the inner side in the tire axial direction of the ground-contact surface,
at least one first middle sipe extending from the first middle circumferential edge and including a termination end within the ground-contact surface and at least one second middle sipe extending from the second middle circumferential edge and including a termination end within the ground-contact surface are on the ground-contact surface of at least one middle block of the plurality of middle blocks,
the termination end of the first middle sipe is located on the inner side in the tire axial direction with respect to the first middle tie bar,
the termination end of the second middle sipe is located on the outer side in the tire axial direction with respect to the second middle tie bar and located on the inner side in the tire axial direction with respect to the termination end of the first middle sipe, and
no groove and no sipe are in a first region which is located on the inner side in the tire axial direction with respect to the termination end of the first middle sipe and on the outer side in the tire axial direction with respect to the termination end of the second middle sipe, on the ground-contact surface of the at least one middle block, wherein
the plurality of land portions includes a crown land portion adjacent to the inner side in the tire axial direction of the middle land portion via the circumferential groove,
the crown land portion includes a plurality of crown blocks demarcated by a plurality of crown lateral grooves fully traversing the crown land portion in the tire axial direction,
the plurality of crown blocks each include a ground-contact surface, a first crown circumferential edge extending in the tire circumferential direction on the first tread end side of the ground-contact surface, and a second crown circumferential edge extending in the tire circumferential direction on the second tread end side of the ground-contact surface,
at least one first crown sipe extending from the first crown circumferential edge and including a termination end within the ground-contact surface and at least one second crown sipe extending from the second crown circumferential edge and including a termination end within the ground-contact surface are on the ground-contact surface of at least one crown block of the plurality of crown blocks,
at least one of the crown lateral grooves includes a first crown tie bar raised at a groove bottom portion at an end portion on the first tread end side thereof, and a second crown tie bar raised at the groove bottom portion at an end portion on the second tread end side thereof, and
in a tread plan view, the termination end of the first crown sipe is at a position overlapping a region obtained by extending the second crown tie bar in parallel with the tire circumferential direction.