Pneumatic tire for bicycle

Abstract

In a pneumatic tire for a bicycle having grooves (30, 31) (inclining portion (32)) formed in the outer surface of a tread (13) to extend substantially in the width direction, and having its rotational direction specified, driving performance or braking performance is enhanced. Since driving force acts on a tire for a rear wheel during acceleration traveling, the entire land (35) between the inclining portions (32) begins to tilt rearward in the rotational direction; since the inclining portions (32) are inclining forward in the rotational direction, as a whole, from a deepest portion (D) toward the end (K) of an opening, a substantially triangular brace (36) formed at the rear end of each land (35) in the rotational direction resists powerfully thus suppressing tilt at each land (35) effectively. Consequently, drive performance is enhanced by enhancement in grip force during driving, and occurrence of uneven wear is suppressed by a uniformed ground-contacting pressure.

Description

technical field [0001] The present invention relates to a pneumatic tire for two-wheeled vehicles in which the rotation direction can be improved and the driving performance or braking performance can be improved. Background technique [0002] Conventionally, as a pneumatic tire for motorcycles in which the driving performance and the braking performance can be improved simultaneously, the tire described in Japanese Patent Application Laid-Open No. 2003-146017 is known. [0003] The tire includes a block row composed of a plurality of blocks on the tread portion. These blocks are divided by inclined longitudinal grooves inclined relative to the tire circumferential direction line and inclined transverse grooves inclined relative to the tire axial line, and along Arranged in the tire circumferential direction; the above-mentioned inclined longitudinal grooves are inclined in the direction of expanding relative to the tire rotation direction at an angle α greater than 10° and ...

AI Technical Summary

Problems solved by technology

[0005] However, such conventional pneumatic tires for motorcycles have the problem that, although the driving performance can be improved to some extent, they cannot be installed on the nearest two-wheeled vehicle that has significantly improved performance and runs on ordinary roads. Insufficient driving performance when riding on a two-wheeled vehicle or a racing two-wheeled vehicle

In addition, there is also a problem that the application range is narrow because the block type must have both longitudinal grooves and lateral grooves formed on the tread portion.

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