Pneumatic Tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorMasayuki NEMOTO
Life of this patent
Estimating the term…
Abstract
A pneumatic tire includes one carcass including a folded up portion and a reinforcing layer between the folded up portion and a bead filler. The folded up portion has an end portion in a region inward of a belt layer in a radial direction and inward of the belt layer in a lateral direction. The bead filler has an outer end portion distanced from a bead heel portion from 20% or more to 40% or less of a tire cross-sectional height. The reinforcing layer has an outer end portion outward of the outer end portion of the bead filler in the radial direction and inward in the radial direction with respect to a position of a tire maximum width position in the radial direction. A sidewall portion is formed of a side rubber having tan δ at 60° C. of from 0.04 or more to 0.10 or less.
Claims16
A pneumatic tire comprising:
- a belt layer disposed inward of a tread portion in a tire radial direction;
- a pair of sidewall portions disposed on both sides of a tire equatorial plane in a tire lateral direction;
- a pair of bead portions disposed inward of the pair of the sidewall portions in the tire lateral direction, the pair of bead portions comprising bead cores formed into annular shapes;
- bead fillers disposed outward of the bead cores in the tire radial direction;
- one carcass disposed across the pair of bead portions, the one carcass having a folded up portion, the folded up portion being folded back outward of the bead core in the tire lateral direction from inward in the tire lateral direction;
- and
- a reinforcing layer disposed between the folded up portion of the carcass and the bead filler;
- the folded up portion of the carcass having an end portion disposed in a region inward of the belt layer in the tire radial direction and inward of the belt layer in the tire lateral direction;
- the bead fillers having outer end portions in the tire radial direction having a distance from bead heel portions of the bead portions in a range from 20% or more to 40% or less of a tire cross-sectional height;
- the reinforcing layer having an outer end portion in the tire radial direction located further outward in the tire radial direction than the outer end portion of the bead filler in the tire radial direction and further inward in the tire radial direction than a position of a tire maximum width position in the tire radial direction, the reinforcing layer having an inner end portion in the tire radial direction located further outward than the bead core in the tire radial direction;
- and
- the sidewall portions made of a side rubber having tan δ at 60° C. in a range from 0.04 or more to 0.10 or less.
Dependencies are inferred from the claim text.