{
  "$type": "site.standard.document",
  "description": "A tread 4 of a tire 2 includes a base layer 30 containing a filler including carbon black and silica. A ratio Sr of a content BSi of the silica to a total of a content BCB of the carbon black and the content BSi of the silica is greater than 0.20. The tread 4 includes land portions 12 separated by…",
  "path": "/patents/1416559",
  "publishedAt": "2026-06-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A tread 4 of a tire 2 includes a base layer 30 containing a filler including carbon black and silica. A ratio Sr of a content BSi of the silica to a total of a content BCB of the carbon black and the content BSi of the silica is greater than 0.20. The tread 4 includes land portions 12 separated by a circumferential main groove 10. A ratio Ur of a thickness TU of the base layer 30 to a depth DGm of the circumferential main groove 10 is 0.20 or more and 0.60 or less. At least one of the land portions 12 includes a sipe 26 having a bottom 26T within the base layer 30. The ratio Sr, the thickness TU of the base layer 30, and a depth DU of the sipe 26 in the base layer 30 satisfy a relational expression: Sr × DU/TU ≥ 0.010.",
  "title": "TIRE"
}