| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire which generates excellent static friction under a severe driving condition, and prevents a damage of a vehicle road under a usual driving condition. SOLUTION: The pneumatic tire has a slip prevention depth and a tread comprising one or more ribs and a circumferential direction groove formed between mutually adjacent ribs. The pneumatic tire has one or more retractable stud pin assembly parts, and the retractable stud pin assembly parts have a container for storing a fluid in cooperation with a spring. The stud pin is mounted to the spring, and the stud pin is lifted with respect to the outer surface of the tread according to the change of the peripheral temperature. COPYRIGHT: (C)2009,JPO&INPIT |
