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US 2022/0371373 A1Published application
Motorcycle tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorYoshimasa UEDA
Life of this patent
Estimating the term…
Abstract
A motorcycle tire comprises a carcass having a bias structure, a band comprising a jointiess ply, and a tread rubber disposed on the radially outside of the band. The loss tangent of the tread rubber at a temperature of 0 deg C. is larger in a tread crown region than in tread shoulder regions. The carcass comprises an outer carcass ply of carcass cords. The angles of the carcass cords with respect to the tire circumferential direction are smaller in the tread crown region than in the tread shoulder regions.
Claims20
A motorcycle tire comprising:
- a tread portion having a pair of tread edges and a tread surface therebetween, and comprising a crown region including a tire equator and a pair of shoulder regions respectively including the tread edges;
- a pair of axially spaced bead portions;
- a pair of sidewall portions extending from the tread edges to the bead portions;
- a bias-ply carcass extending between the bead portions through the tread portion and the sidewall portions, and comprising a plurality of carcass plies of carcass cords, including an outer carcass ply which is radially outermost in the tread portion in the carcass plies;
- a band disposed radially outside the carcass in the tread portion, and comprising a jointless band ply composed of at least one band cord wound spirally and circumferentially of the tire at 5 degrees or less with respect to the tire circumferential direction;
- and
- a tread rubber disposed radially outside the band, wherein
- a loss tangent of the tread rubber at a temperature of 0 deg C. is larger in the crown region than in the shoulder regions, and
- angles of the carcass cords of the outer carcass ply with respect to the tire circumferential direction are smaller in the crown region than in the shoulder regions.
6 more elements
Dependencies are inferred from the claim text.