Pneumatic tire
AssigneeToyo Tire Corporation
InventorKazuo Shimomura
Life of this patent
Estimating the term…
Abstract
A pneumatic tire has a rim strip rubber. A radial height of the rim strip rubber on the basis of an outer diameter position of a bead core is equal to or more than 70% of a radial height of a tire outer diameter position. An upper end of a side reinforcing layer is arranged closer to an outer side radially than an upper end of a bead filler. A distance from a tire maximum width position to the upper end of the side reinforcing layer is equal to or less than 5 mm. The maximum thickness Tw of the rim strip rubber between the upper end of the bead filler and the upper end of the side reinforcing layer is greater than the maximum thickness Tm of the rim strip rubber closer to the outer side radially than the upper end of the side reinforcing layer.
Claims9
A pneumatic tire comprising:
- a carcass layer which gets to a bead portion from a tread portion via a side wall portion on both sides of the tire, at least one of the sides of the tire further comprising:
- a side reinforcing layer which extends in a tire radial direction from the bead portion to the side wall portion;
- a side wall rubber which forms an outer surface of the side wall portion;
- and
- a rim strip rubber which forms an outer surface of the bead portion,
- wherein an annular bead core and a bead filler provided in an outer side in the tire radial direction of the bead core are buried in the bead portion,
- wherein the rim strip rubber extends in the tire radial direction between the carcass layer and the side wall rubber, and a radial height of the rim strip rubber from an outer diameter position of the bead core is equal to or more than 70% of a radial height of a tire outer diameter position from the outer diameter position of the bead core,
- wherein an upper end of the side reinforcing layer is arranged closer to an outer side in the tire radial direction than an upper end of the bead filler, and a distance in the tire radial direction from a tire maximum width position to the upper end of the side reinforcing layer is equal to or less than 5 mm,
- wherein the maximum thickness Tw of the rim strip rubber in a first radial height region between the upper end of the bead filler and the upper end of the side reinforcing layer is formed greater than the maximum thickness Tm of the rim strip rubber closer to the outer side in the tire radial direction than the upper end of the side reinforcing layer, and
- wherein the thickness Tw of the rim strip rubber is equal to or more than 1.1 times of the maximum thickness Tm.
Dependencies are inferred from the claim text.