Pneumatic radial tire

Details Pneumatic radial tire Pneumatic radial tire

B - Operations, Transporting

60

C

152/85.2

B60C 9/18 (2006.01) B60C 9/22 (2006.01)

Patent

CA 2011961

A pneumatic radial tire including a carcass layer having cords embedded therein and arranged perpendicular to an equatorial plane of the tire, and a belt layer including at least one belt ply having a large number of cords or filaments embedded therein, said cords or filaments being disposed radially outside of said carcass layer, arranged substantially in parallel to the equatorial plane of the tire and bent in a form including one of a wavy or zigzag form, at least those of the cords or filaments located at widthwise outermost locations in the parallel belt ply satisfying the following expression: d x a/.lambda. 0.005 and the cords or filaments in said parallel belt ply satisfying the following expression: a/.lambda. 0.1 wherein d is a filament diameter of the cords or filaments; .lambda. is a wavelength of the form; and a is a half wavelength amplitude of the form. Further, cords inclined at an angle of 10 to 50 degrees with respect to the equatorial plane of the tire are embedded in an inclined belt ply provided radially outside the carcass layer, thereby increasing the internal shearing rigidity of the belt layer and increasing the cornering power.

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