Motorcycle tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorKyosuke KONO
Life of this patent
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Abstract
A motorcycle tire comprises a tread reinforcement including a jointless band ply. The jointless band ply has a developed width Wa of not more than 65% of the developed tread width TWe. The tread portion has a tread profile comprising a crown arc portion having a radius R1 of curvature and a pair of shoulder arc portions having a radius R2 of curvature. The radius R1 is smaller than the radius R2 and smaller than 50% of the maximum tire cross-section width Wt. In a normal state of the tire, the axial ends of the crown arc portion are respectively positioned axially inward of the outer edges of the jointless band ply.
Claims18
A motorcycle tire comprising:
- a tread portion,
- a toroidal carcass, and
- a tread reinforcement disposed radially outside the carcass in the tread portion, wherein
- the tread reinforcement includes a band layer,
- the band layer is composed of a jointless band ply made of a band cord spirally wound at an angle of not more than 5 degrees with respect to the tire circumferential direction,
- the jointless band ply is centered on the tire equator and has a developed width of not more than 65% of a developed tread width,
- the tread portion has a tread profile comprising
- a pair of shoulder arcs portions having a radius R2 of curvature, and
- a crown arc portion having a radius R1 of curvature and extending between the shoulder arcs portions across the tire equator,
- the radius R1 of curvature is less than the radius R2 of curvature,
- the radius R1 of curvature is less than 50% of the tire section width,
- in a normal state of the tire in which the tire is mounted on a regular rim and inflated to a normal tire pressure, axial ends of the crown arc portion are respectively located axially inward of axial edges of the jointless band ply.
Dependencies are inferred from the claim text.