{
  "$type": "site.standard.document",
  "description": "A pneumatic tire includes a tread surface having a plurality of main grooves extending straight in a circumferential direction of the tire. The plurality of main grooves defines land portions extending in the tire circumferential direction. The land portions each have a ground contact surface…",
  "path": "/patents/1076966",
  "publishedAt": "2005-06-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0083",
    "YOKOHAMA RUBBER CO LTD [JP]"
  ],
  "textContent": "A pneumatic tire includes a tread surface having a plurality of main grooves extending straight in a circumferential direction of the tire. The plurality of main grooves defines land portions extending in the tire circumferential direction. The land portions each have a ground contact surface comprising a first circular arc having a single curvature radius in tire meridian cross section. The ground contact surface of at least the land portion which is located second when counted from the outer side of a vehicle when the tire is mounted thereon, is arranged so as to have the first circular arc and at least a second circular arc connected thereto on the vehicle outer side thereof. The circular arc located closer to the vehicle outer side has a smaller curvature radius and is positioned more inwardly away from the tread surface. The ratio d/D of the depth d of an intersection of the circular arc located closest to the vehicle outer side with a vehicle outer sidewall surface of the at least second land portion to the groove depth D of the main groove facing to the vehicle outer sidewall surface is 0.02 to 0.1.",
  "title": "PNEUMATIC TIRE"
}