Safety pneumatic tires

Claim 1

A safety pneumatic tire for motorcyles compising a toroidal shaped carcass having rubberized cord plies extending between a pair of left and right beads and said cords of the plies being inclined with respect to the equatorial plane of the tire and being crossed with each other between said plies, a tread having a large width on a crown portion of said carcass and extending parallel to a curvature of said carcass, sidewalls connecting said tread to each of said beads with substantially uniform thickness, a sidewall reinforcing layer comprising a rubber which is partially meniscus-shaped in section and disposed along said carcass in each sidewall, said sidewall reinforcing layer having a thickness required for supporting the load which is subjected to the tire when it is punctured and a modulus of elasticity at 100% elongation of 40 to 120/kg/cm 2 and made integral with said bead, a tread reinforcement comprising at least one rubber layer having a modulus of elasticity which is greater than a modulus of elasticity of ply coating rubber of the carcass and interposed between plies of the carcass, and a first and a second cord layer in which cords are inclined with respect to the equatorial plane of the tire at an angle which is greater than an angle formed by cords of the carcass plies with respect to the equatorial plane of the tire, said first cord layer being disposed on the underside of the carcass and said second cord layer is disposed on the overside of the carcass; and a relatively narrow zone formed on the carcass between said sidewall reinforcing layer and said rubber layer and which is easily susceptible to bending deformation, said narrow zone being located at a position which is a height (h) of 50% to 75% of a section height (H) of the tire, wherein the height (h) is a distance from a bead base to the center of the narrow zone in the radial direction of the tire and the section height (H) is a distance from the bead base to a top of the tread in said direction.