{
  "$type": "site.standard.document",
  "description": "A circumferential narrow main groove extending in a circumferential direction in a tread of a pneumatic tire. The circumferential narrow main groove includes a narrow portion opening to a road contact surface of the tread and a widened portion having a wider groove width than the narrow portion…",
  "path": "/patents/1313988",
  "publishedAt": "2022-03-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0316",
    "The Yokohama Rubber Co., LTD."
  ],
  "textContent": "A circumferential narrow main groove extending in a circumferential direction in a tread of a pneumatic tire. The circumferential narrow main groove includes a narrow portion opening to a road contact surface of the tread and a widened portion having a wider groove width than the narrow portion. The widened portion is at a groove bottom. A groove width ratio (W/W) of a maximum groove width W of the widened portion to a groove width W of the narrow groove portion is in a range 1.5≤(W/W)≤4.0, and a cross-sectional area ratio (A/A) of a groove bottom-side cross-sectional area A to a groove opening-side cross-sectional area A in a meridian cross-section is within a range 1.2",
  "title": "TIRE"
}