| 摘要 |
<p>In a pneumatic tire for a race car, the present invention offers a tire by way of providing a tread rubber layer being divided into a tread base layer (4) and a tread cap layer (5) disposed over the tread base layer (4). The tread base layer (4) is composed of a rubber material having a greater modulus than that of the rubber material for the tread cap layer (5). The shoulder region of the tread rubber layer is further divided into a shoulder base layer (41) and a shoulder cap layer (51), wherein the rubber material for the shoulder cap layer (51) has a less modulus than that of the rubber material for the tread cap layer (5). Thus, the moving of the rubber material in the tread portion (1) is suppressed, resulting in reducing the heat generation therein and also decreasing the change of the property of the rubber material within the tread portion (1). Consequently, the inventive tire is capable of enhancing the gripping and cornering performance for a long period of time during running at a high speed.</p> |
