| 摘要 |
A tyre having a ground contacting tread comprising tread grooves which divide the tread into a plurality of tread pattern elements provided on its radially outer surface with a radially outwardly projecting ridge (5) disposed on an edge of the pattern element and at least one radially inwardly projecting small groove extending to the projecting ridge which facilitates the dispersal of trapped air in the moulding and vulcanisation operation of the tyre manufacturing process. <IMAGE> |
