PNEUMATIC TIRE FOR TWO-WHEELED VEHICLE

WIPO Patent Application WO/2007/052701

A1

Disclosed is a pneumatic tire for a two-wheeled vehicle, capable of improving response relative to steering angle and lightness of handling and of proving excellent steering stability during high-speed traveling by securing grip force during turning. The pneumatic tire (10) comprises bead cores (20), bead parts (18), a carcass (16), a diagonal belt layer (24) disposed on the tire radial outer side of the carcass, a spiral belt layer (22), and a tread rubber (30) forming a tread (28). In the lateral cross section of the tire, the center part of the tread (28) is formed of a tread rubber (30A) and both side-parts thereof are formed of tread rubbers (30B). The tread rubber (30A) is harder than the tread rubbers (30B), and boundaries between the tread rubber (30A) and the tread rubbers (30B) are formed in a ground contact surface when the rotating axis of the tire is positioned parallel with a road surface. As a result, the torsional rigidity of the center part can be increased, the lateral flexural rigidity of the both side-parts can be maintained in a low state, the response relative to steering angle and the lightness of handling can be improved and the steering stability during high-speed traveling can be increased since the grip force during turning can be secured.

NAKAGAWA HIDEMITSU (JP)

PCT/JP2006/321861

May 10, 2007

November 01, 2006

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BRIDGESTONE CORP (JP)
NAKAGAWA HIDEMITSU (JP)

B60C11/00; B60C5/00; B60C9/18; B60C9/22

JPS6094804A	1985-05-28
JPS57182502U	1982-11-19
JPH09286204A	1997-11-04
JPH054503A	1993-01-14
JP2000158910A	2000-06-13
JP2004067058A	2004-03-04
JP2003515487A	2003-05-07
JP2006199112A	2006-08-03
EP1657080A1	2006-05-17
JP2006273278A	2006-10-12

SUGIMURA, Kosaku et al. (2-4 Kasumigaseki 3-chom, Chiyoda-ku Tokyo 13, JP)

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