{
  "$type": "site.standard.document",
  "description": "A pneumatic tire for heavy load including, on a tread surface thereof, land portions defined by a plurality of lug grooves each extending in the tread width direction while opening at one end thereof to the tread ground-contact end, in which: the tire has a negative ratio Nc of 2% to 10% in a tread…",
  "path": "/patents/943441",
  "publishedAt": "2016-05-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0304",
    "BRIDGESTONE CORP [JP]"
  ],
  "textContent": "A pneumatic tire for heavy load including, on a tread surface thereof, land portions defined by a plurality of lug grooves each extending in the tread width direction while opening at one end thereof to the tread ground-contact end, in which: the tire has a negative ratio Nc of 2% to 10% in a tread center side region; the lug groove has a depth da, the land portion has a width Rw, and the land portion has an extending length L, so that the land portion center line has a length of 0.5 L or more in a segment where Rw/da is 1.3 to 2.5; and the land portion center line has a length of 0.3 L or more in a segment having a tilt angle ± of 60° or less relative to the tire equator direction.",
  "title": "HEAVY-DUTY PNEUMATIC TIRE"
}