| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem not taken into account in the prior art that unsatisfactory air pressure is generated when replaced to a spare tire by a user in a flat tire or the like, or that the air pressure is reduced or punctured after replaced to the spare tire. SOLUTION: A monitor for monitoring the air pressure is imparted to the spare tire. The monitor for monitoring the air pressure is attached to the spare tire, an air pressure value is transmitted by a radio wave to be received in a vehicle side, and the air pressure value of the spare tire is monitored therein. COPYRIGHT: (C)2003,JPO
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