Motorcycle tire for running on rough terrain

Abstract

A motorcycle tire for running on rough terrain is provided, the rotation direction of the motorcycle tire is specified, and the motorcycle tire can maintain traction force and improve brake stability. At least one of pattern blocks comprises a first pattern block, the first pattern block comprises a tread portion, a first ground-touching side wall surface extending from a front edge of the tread portion toward the internal side, and a back ground-touching sidewall surface extending from a back edge toward the internal side. The first ground-touching side wall surface of the pattern block is formed by a steeply inclined surface inclining toward the first ground-touching side. The back ground-touching sidewall surface comprises: a front end side region and a root side region connected with the front end side region and extending toward the internal side. The front end side region is formed by a gently inclined surface inclining toward the back ground-touching sidewall side. The root side region is provided with: a middle surface extending in the same angle with the front end side region; a pair of side part surfaces formed by steeply inclined surfaces disposed respectively at two sides of the pattern block width direction of the middle surface and inclining toward the back ground-touching side; and a step surface connecting the side part surfaces and the middle surface.

Description

technical field [0001] The present invention relates to a motorcycle tire for driving on uneven ground capable of maintaining traction and improving braking stability. Background technique [0002] For example, a motorcycle tire for running on rough terrain used in motocross races etc. has a plurality of blocks formed on the tread portion (see, for example, Patent Document 1 below). Such tires can make each tread block sink into soft roads such as sandy ground or muddy ground to gain traction. On the other hand, when the sinking amount of the blocks into the road surface is too large, there is a problem that running resistance increases. [0003] Therefore, if Figure 9 As shown, the block a has a shape that extends from the trailing edge b1 of the tread b on the rear landing side in the tire rotation direction r to the rear landing side wall surface e1 of the groove bottom d, which is formed to be larger than the rear landing side wall surface e1 in the tire rotation direc...

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional block a, since the rear landing side wall surface e1 is formed as a continuous surface in the width direction of the block, for example, when braking during cornering, the resistance of the rear landing side wall surface e1 to the lateral force is small. As a result, the tires are more likely to slip sideways, and there is a problem of poor stability

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