{
  "$type": "site.standard.document",
  "description": "Provided is a tire comprising a tread part, wherein the tread part at least comprises a first rubber layer (4) located on an outermost side in a tire radial direction, and a second rubber layer (5) adjacent to an inner side of the first rubber layer in the tire radial direction, wherein a tread…",
  "path": "/patents/1391635",
  "publishedAt": "2026-04-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "Provided is a tire comprising a tread part, wherein the tread part at least comprises a first rubber layer (4) located on an outermost side in a tire radial direction, and a second rubber layer (5) adjacent to an inner side of the first rubber layer in the tire radial direction, wherein a tread surface of the tread part comprises two or more circumferential main grooves (2) extending in a tire circumferential direction, and land parts partitioned off by the circumferential main grooves, wherein at least one circumferential main groove among the circumferential main grooves is formed such that the deepest part of its groove bottom is located on an inner side in the tire radial direction with respect to an outermost part of the second rubber layer within a land part adjacent to the at least one circumferential main groove, wherein a land ratio of the crown region is higher than a land ratio of the shoulder region and tan δ at 0°C of the first rubber layer is less than a tan δ at 0°C of the second rubber layer.",
  "title": "TIRE"
}