{
  "$type": "site.standard.document",
  "description": "A pneumatic tire (1) comprises a tread portion (2) comprising: a reinforcing cord layer (10) including at least one belt ply (7A) of steel cords (12) rubberized with topping rubber (13); and a tread rubber (2G) forming a part of the tread portion (2) from a ground contacting surface (2s) of the…",
  "path": "/patents/1386167",
  "publishedAt": "2026-03-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0008",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A pneumatic tire (1) comprises a tread portion (2) comprising: a reinforcing cord layer (10) including at least one belt ply (7A) of steel cords (12) rubberized with topping rubber (13); and a tread rubber (2G) forming a part of the tread portion (2) from a ground contacting surface (2s) of the tread portion (2) to the radially outer side of the reinforcing cord layer (10). A product T1 x T2 x La x tanδ1 is 0.33 to 1.10, wherein T1 is the thickness in mm of the tread rubber (2G) measured at the tire equator (C); T2 is the average thickness in mm of the or each belt ply (7A); La is the land ratio of the ground contacting surface (2s); and tanδ1 is the loss tangent of the tread rubber (2G) at 30 degrees C.",
  "title": "PNEUMATIC TIRE"
}