Pneumatic tire for motorcycles
AssigneeBridgestone Tire Company Limited
InventorsTakeshi Sato, Yoshinari Matsubara
Life of this patent
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Abstract
A pneumatic tire for motorcycles having an excellent high speed running stability comprising a stress relieving rubber layer interposed between carcass plies and covering the center of a crown portion of the carcass over a range from 10% to 50% of the total width measured along the outer contour of a tread portion.
Claims6
In a pneumatic tire for motorcycles having an excellent high speed stability comprising a torodial-shaped carcass composed of a pair of plies each formed of textile cords covered with coating rubber and extending from one of a pair of annular bead portions to the other bead portion, a tread portion superimposed about a crown portion of said carcass and extending along the outer contour of said crown portion to such an extent that the tread has a width larger than a maximum width between sidewalls of the tires, and a lenticular stress relieving rubber layer interposed between said plies of said carcass symmetrically with respect to the equatorial plane of the tire, the improvement comprising, said stress relieving rubber layer having a width of 15% to 35% of a tread width measured along the outer contour of said tread portion, and a modulus of 16 kg/cm.sup.2 to 30 kg/cm.sup.2 at 100% elongation.
Dependencies are inferred from the claim text.