| 摘要 |
A tyre tread pattern comprising a central zone (1) and two edge zones (2) in which the edge zones (2) are subdivided circumferentially of the tyre by a series of transverse grooves (12) each having an axially outer end open to the tread edge characterised by in each transverse groove (12) a noise baffle (13) comprising a circumferentially extending rib across the groove and having a height (h) of 25% to 75% of the groove depth (d). The noise baffle is preferably quite narrow so that it does not materially affect the stiffness of the blocks but act as a noise baffle only. It may be a single baffle or two or more short baffles interlocking to block noise transmission.
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