Patent ID: 11897288
Assignee: THE YOKOHAMA RUBBER CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A pneumatic tire comprising a plurality of blocks on a tread surface;
the blocks each comprising a plurality of recess/protrusion portions on a road contact surface;
a recess/protrusion height Hc of each of the recess/protrusion portions being in a range 0.1 mm≤Hc≤1.0 mm;
a width Wc of each of the recess/protrusion portions being in a range 0.1 mm≤Wc≤0.8 mm;
a recess/protrusion region being defined as a region where an arrangement interval Dc between the recess/protrusion portions adjacent to each other is in a range Dc≤1.2 mm;
a smooth region being defined as a region other than the recess/protrusion region and in which an arithmetic average roughness Ra of the road contact surface of the blocks is in a range Ra≤50 μm;
a cross-section X perpendicular to a tire lateral direction being defined;
a lateral length Wb of the road contact surface of each of the blocks in the tire lateral direction being defined; and
the blocks each comprising the recess/protrusion region and the smooth region in an optional cross-section X within a lateral range of not less than 40% of the lateral length Wb of the road contact surface of the blocks; wherein
a width W1 of the recess/protrusion region and a width W2 of the smooth region adjacent to the recess/protrusion region have a relationship 0.50≤W1/W2≤1.50;
the smooth region is disposed between adjacent recess/protrusion regions adjacent to each other; and
the recess/protrusion region extends across an entire width of a respective one of the blocks at a widest portion of the one of the blocks.