| 摘要 |
A radial tyre (1) comprising a carcass (6) extending between bead portions (4) through sidewall portions (3) and a tread region (2) comprising at least one ply of radially arranged cords turned up around bead cores (5), and a belt disposed radially outside the carcass (6) and inside the tread and composed of a breaker (7) and a band (9), said breaker (7) comprising at least two plies of cords inclined with respect to the tyre equator so that the cords in each ply cross the cords in the next ply, characterised in that the band (9) is disposed on the radially outer side of the breaker (7a,7b) and comprises a strip (T) of rubberised parallel organic fibre cords (12) which strip (T) is wound spirally and continuously around the breaker from its one edge to the other edge, the number of said organic fibre cords (12) in the strip (T) being in the range of 10 to 25, the winding pitches of the strip (T) being changed in the axial direction of the tyre so that the pitches (P) are smaller in a central region (7A) of the breaker than in the side regions (7B), the pitches (P) in the side regions (7B) being substantially a half of the strip width, and the pitches (P) in the central region (7A) being not less than the strip width. <IMAGE> |
