{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A pneumatic tire includes a tread portion provided with three to five circumferentially extending main grooves (3) and a plurality of lateral grooves (4), to form a plurality of block rows (5R) each of which includes a plurality of tread blocks (5). Each tread block includes a ground contact…",
  "path": "/patents/973553",
  "publishedAt": "2014-06-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0306",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic tire includes a tread portion provided with three to five circumferentially extending main grooves (3) and a plurality of lateral grooves (4), to form a plurality of block rows (5R) each of which includes a plurality of tread blocks (5). Each tread block includes a ground contact surface with a polygonal shape that has at least five sides and each interior angle (¸) of not less than 90 degrees. Each ground contact surface of the tread block includes a maximum axial width W1 positioned between its circumferentially both ends (Ef, Er), a circumferential length L1 between its circumferentially both ends, and a ratio W1/L1 of the maximum axial width W1 to the circumferential length L1 in a range of from 0.6 to 0.9.",
  "title": "Pneumatic tire"
}