| 摘要 |
1,182,805. Pneumatic tyres. PIRELLI S.p.A. 15 June, 1967 [15 July, 1966], No. 27657/67. Heading B7C. A pneumatic tyre of the replaceable tread type comprises a tread ring 1 seated on a casing 2 and provided with a rubber strip 9 of lenticular section between the reinforcing cords 3 of the tread ring and the carcass 6 of the casing, the strip having a maximum thickness radially of the tyre falling within the range from 0À2 to 1.5% of the greatest diameter of the carcass without the strip on it and a hardness greater than the rubber encasing the radial cords of the carcass. The casing may be provided with a breaker structure constituted by cross-laid plies 7 and 8 each comprising parallel metal cords. The tread ring may also be provided with cross-laid plies 4 and 5 each comprising parallel metal cords |
