Pneumatic tire for rough terrain

Abstract

The present invention provides a pneumatic tire for rough terrain, to maintain a grip during cornering and traction performance, and to reduce the rigid feeling of improved light manipulation. A pneumatic tire for rough terrain comprises a tread portion (2) provided with a plurality of blocks (11), the blocks (11)comprising a plurality of center blocks (12), a plurality of shoulder blocks (13) and a plurality of middle blocks (14), each of the center blocks, middle blocks and shoulder blocks comprising a top face (15) and a sidewall face (16), wherein at least one of the middle blocks(14) and shoulder blocks (13) is a U-shaped block (18) having a lateral slot (17) which extends from an axially outer sidewall face of the block to an axially inner end thereof being terminated within the block.

Description

technical field [0001] The present invention relates to a pneumatic tire for driving on rough terrain, which maintains grip and traction performance during cornering, reduces stiffness, and improves lightness of handling. Background technique [0002] Vehicles that run on uneven ground such as off-road motorcycles and rally cars generally use block-shaped pneumatic tires that have a plurality of blocks on the tread portion. A tire having such a block pattern can ensure driving force on soft muddy ground by sinking the blocks into the road surface. [0003] In addition, in order to further improve running performance on uneven ground, a pneumatic tire has been proposed in which recesses are provided on the tread and wall surfaces of the blocks (for example, Patent Document 1 below). Such a pneumatic tire increases the edge component by being provided in the concave portion of the block, thereby improving the grip and traction performance. [0004] Patent Document 1: Japanes...

AI Technical Summary

Problems solved by technology

[0005] However, in such a pneumatic tire as described above, the rigidity of the tread end side of the block, for example, is relatively large.

Due to this deviation in rigidity, the driver has a "stiff feeling" that measures the operability in terms of tactile sense, such as "twist and click" when turning, and there is a problem that the lightness of steering is deteriorated.

Images