{
  "$type": "site.standard.document",
  "description": "A pneumatic tire comprises a tread rubber disposed radially outside a tread reinforcing belt, the tread rubber includes a radially outmost cap tread rubber (G2) and a radially inner base tread rubber, wherein the base tread rubber includes a central base tread rubber (G1b) centered on the tire…",
  "path": "/patents/1105025",
  "publishedAt": "2002-04-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/00",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic tire comprises a tread rubber disposed radially outside a tread reinforcing belt, the tread rubber includes a radially outmost cap tread rubber (G2) and a radially inner base tread rubber, wherein the base tread rubber includes a central base tread rubber (G1b) centered on the tire equator and a side base tread rubber (G1a) disposed on each side of the central base tread rubber, and the tread rubber having one of the following hardness distributions (a) and (b): (a) the side base tread rubber is hardest in the tread rubber, and the cap tread rubber has a hardness of from 53 to 63 degrees, the central base tread rubber has a hardness of from 45 to 60 degrees, and the side base tread rubber has a hardness of from 65 to 75 degrees; (b) the side base tread rubber is softest in the tread rubber, and the cap tread rubber has a hardness of 60 to 80 degrees, the central base tread rubber has a hardness of from 65 to 75 degrees, and the side base tread rubber has a hardness of from 45 to 60 degrees.",
  "title": "Pneumatic tire"
}