Claims
- 1. A pneumatic radial tire comprising at least one carcass layer composed of cords disposed at substantially a right angle to the circumferential direction of the tire and four belt layers sandwiched between said carcass layer and a tread, said four belt layers including at least two metallic cord layers and having a pair of layers capable of substantially functioning as a tension band, wherein said pair of layers are composed of a second belt layer and a third belt layer in the direction of from the carcass layer to the tread of the tire, fatigue resistance of the cords of said second belt layer being significantly greater than fatigue resistance of the cords of said third belt layer, wherein the cords of said third belt layer are each a steel cord, and the cords of said second belt layer are each a steel cord.
- 2. A pneumatic radial tire according to claim 1, wherein the cords of said carcass layer are each a metallic cord.
- 3. A pneumatic radial tire according to claim 1, wherein the cords of said carcass layer are each an organic fiber cord.
Priority Claims (2)
Number |
Date |
Country |
Kind |
62-318922 |
Dec 1987 |
JPX |
|
62-318924 |
Dec 1987 |
JPX |
|
Parent Case Info
This application is a continuation-in-part of application Ser. No. 282,425 filed Dec. 12, 1988.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
59-67108 |
Apr 1984 |
JPX |
1-160703 |
Jun 1989 |
JPX |
0851898 |
Oct 1960 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Peeters et al., "New Developments in Steel Cord for Tyres", Intl. Polymer Science and Technology, vol. 11, No. 10, 1984, pp T153-T160. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
282425 |
Dec 1988 |
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