| 摘要 |
<p>A tubeless tyre comprises a carcass (6) composed of a single ply of cords (10A), and a belt (7) disposed radially outside the carcass (6) in the tread portion (2). The single carcass ply (6) comprises a main portion (6A) extending between bead portions (4) through a tread portion (2) and sidewall portions (3), and a pair of turnup portions (6b) turned up around bead cores (5) in the bead portions (4) from the inside to the outside of the tyre. The inside of the carcass ply main portion (6A) facing a tyre cavity or hollow is covered with a first topping rubber (11i) compound which comprises, based on 100 parts by weight of rubber base material, at least 10 parts by weight of butyl rubber and/or derivative. The radially outer edge (6be) of each carcass ply turnup portion (6b) is terminated within a belt edge region (Be) which region is defined as extending 20 mm axially inwards and 30 mm axially outwards along the carcass ply main portion from an intersecting point (Q) which is defined as of the ply main portion with a straight line (M) drawn from each of axial outer edges (7e) of the belt (7) perpendicularly to the carcass ply main portion (6a). <IMAGE></p> |
