| 摘要 |
A tire tread has a decoupling groove ( 18 ) with an opening angle (alpha) of approximately 15°. Even if gravel is moved into the groove ( 18 ) by the decoupler rib ( 14 ), it will easily fall out once the tread section loses touch with the road surface and the groove ( 18 ) expands to its relaxed shape. Additionally, the ridge ( 24 ) of the decoupler rib ( 14 ) is rounded with a radius (R 2 ) of about 2 mm. By this means, it has a much lower tendency to pick up rocks by scooping when bending toward the shoulder rib ( 16 ). A rounded bottom of the decoupling groove ( 18 ) with a radius (R 1 ) of approximately 1.5 mm, will prevent any rocks from wedging into the bottom of the decoupling groove ( 18 ).
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