{
  "$type": "site.standard.document",
  "description": "A tire 2 includes a tread 4 on which at least three circumferential grooves 24 continuously extending in a circumferential direction are formed, and a belt 14 located radially inward of the tread 4. A ratio of a center stretch, at a center portion of the belt, indicated by the following formula (2)…",
  "path": "/patents/1424380",
  "publishedAt": "2024-03-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B29D30/08",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A tire 2 includes a tread 4 on which at least three circumferential grooves 24 continuously extending in a circumferential direction are formed, and a belt 14 located radially inward of the tread 4. A ratio of a center stretch, at a center portion of the belt, indicated by the following formula (2) to a shoulder stretch, at an end portion of the belt, indicated by the following formula (1) is not less than 1 and not greater than 3, and the shoulder stretch is not less than 1%. (Shoulder stretch) 100 × Rsa − Rsb / Rsb (Center stretch) 100 × Rca − Rcb / Rcb",
  "title": "HEAVY-DUTY PNEUMATIC TIRE AND MANUFACTURING METHOD THEREOF"
}