Motorcycle tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorShohei SHIBAMOTO
Life of this patent
Estimating the term…
Abstract
A motorcycle tire comprises a tread portion provided with a belt layer and a radially outer band layer. The belt layer comprises a first belt ply on a carcass 6 and a second belt ply thereon. The band layer is made of a spirally wound band cord and has a developed width smaller than that of the belt layer. In a meridian cross-section of the tire mounted on a standard wheel rim at an internal pressure of 10 kPa: the radius of curvature Rc of the ground contacting surface of the tire in its crown region is less than 95% of the cross-sectional width of the tire; and the radius of curvature Rc is smaller than a radius of curvature Rb of the ground contacting surface in shoulder regions.
Claims19
A motorcycle tire comprising:
- a tread portion having a ground contacting surface;
- a pair of sidewall portions;
- a pair of bead portions;
- a carcass extending between bead portions through the tread portion and the sidewall portions;
- tread reinforcing layers disposed radially outside the carcass in the tread portion, and including a belt layer and a band layer disposed radially outside the belt layer;
- the belt layer comprising a first belt ply disposed adjacently to the carcass and a second belt ply disposed radially outside the first belt ply;
- and
- the band layer comprising a band cord wound spirally in the circumferential direction of the tire and having a developed width smaller than that of the belt layer, wherein
- in a meridian cross-section of the tire which is mounted on a standard wheel rim and of which internal pressure is 10 kPa, the ground contacting surface of the tread portion is such that:
- a radius of curvature Rc of the ground contacting surface of the tire in its crown region passing through the tire equator, is less than 95% of the cross-sectional width of the tire;
- and
- the radius of curvature Rc is smaller than a radius of curvature Rb of the ground contacting surface of the tire in a shoulder region defined on the axially outer side of an axial edge of the band layer.
Dependencies are inferred from the claim text.