{
  "$type": "site.standard.document",
  "description": "There is provided a pneumatic tire capable of reducing rolling resistance and suppressing river wear of uneven wear. A pneumatic tire according to the present invention comprises a tread portion provided with one or more circumferential grooves extending in parallel with a tire equator to define a…",
  "path": "/patents/1014743",
  "publishedAt": "2011-03-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0008",
    "BRIDGESTONE CORP [JP]"
  ],
  "textContent": "There is provided a pneumatic tire capable of reducing rolling resistance and suppressing river wear of uneven wear. A pneumatic tire according to the present invention comprises a tread portion provided with one or more circumferential grooves extending in parallel with a tire equator to define a plurality of land portions, wherein at least surface rubber of the tread portion has tan´of not less than 0.02 and not more than 0.2, a wall angle of a widthwise outer wall of the circumferential groove is larger than a wall angle of a widthwise inner wall of the circumferential groove, a plurality of sipes extending in a direction across the tire equator are provided in the land portions, and a length of the sipe formed in an end portion of the land portion arranged adjacent to the circumferential groove in the widthwise outer side is longer than a length of the sipe formed in an end portion of the land portion arranged adjacent to the circumferential groove in the widthwise inner side.",
  "title": "PNEUMATIC TIRE"
}