{
  "$type": "site.standard.document",
  "description": "Provided is a pneumatic tire that achieves both streeling stability and good wet grip performance. This pneumatic tire comprises a tread having two or more circumferential main grooves extending continuously in the circumferential direction of the tire, wherein: the circumferential main grooves of…",
  "path": "/patents/1407935",
  "publishedAt": "2026-03-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C1/0016",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "Provided is a pneumatic tire that achieves both streeling stability and good wet grip performance. This pneumatic tire comprises a tread having two or more circumferential main grooves extending continuously in the circumferential direction of the tire, wherein: the circumferential main grooves of the tread include a main crown groove formed in a central region of the tread in the width direction and a main shoulder groove formed in an edge region of the tread in the width direction; the shoulder main groove positioned on the outermost side when the tire is mounted to a vehicle, has a ratio (W1/W2) of 0.30 to 0.75 between a groove width W1 at the groove depth 90% position when the groove depth at the groove bottom is 100% and the groove width W2 on the tread surface; a ratio (S1/S2) between a cross-sectional area S1 of the main shoulder groove and a cross-sectional area S2 of the main crown groove is 0.40 to 1.0; and a rubber composition forming the tread has a 5°C tan δ of 0.10 to 0.60, a |20°Ctan δ - 50°Ctan δ| of 0.10 or less, and a 20°C E' of 8.0 MPa or more.",
  "title": "PNEUMATIC TIRE"
}