Pneumatic tires for large size and high speed motorcycles

Details Pneumatic tires for large size and high speed motorcycles Pneumatic tires for large size and high speed motorcycles

1979-12-17

1981-09-15

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

D12141, B60C 1104

Patent

active

042891825

ABSTRACT:
Pneumatic tires for large size and high speed motorcycles in which a tread extends about a crown of a toroidal carcass along a sectional profile of said carcass from a center of the crown to both sides thereof to such an extent that the tread has a width larger than a maximum width between sidewalls of the tire and at least one circumferential groove is provided at the center portion of the crown. At least two oblique grooves are inclined at acute angles against the circumferential grooves toward the driving force acting when the tires are running, and are provided at each side area defined by the above described central circumferential grooves. The oblique grooves comprise first oblique grooves which extend from said central circumferential groove toward the tread edge and terminate at top ends which do not reach the tread edge and second oblique grooves which extend from a position somewhat outward from the central circumferential groove, in substantially parallel to the first oblique grooves and beyond the top ends of the first grooves toward the tread edge. The area defined by the oblique grooves forms a circumferentially connecting staggering rib.

REFERENCES:
patent: D251553 (1979-04-01), Sato et al.
patent: 3730245 (1973-05-01), Kusunoki et al.
patent: 4166490 (1979-09-01), Poque
Cycle World, Feb. 1975, RE5 vs R90/6 vs Z1B.

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