| 摘要 |
PURPOSE: A pneumatic tire is provided to prevent air leakage of a tire without modifying the shape of the tire, and to restrict slip between a rim and a bead part by forming an air inflow groove in the bead part. CONSTITUTION: A pneumatic tire is composed of a tread part(1), a side wall(2) and a bead part(3). The inside of a rim(4) is contacted to a bead hill part(30) at the outside of the bead part, and an air inflow groove(31) is formed in the bead part. The diameter of the air inflow groove is reduced in the end, and increased in the rear part. Compressed air is collected with chamfering the bead hill part in forming the air inflow groove. Air between the bead part and the rim is moved in the air inflow groove in pressing the bead part to the rim, and the air space is reduced. Slip between the rim and the bead part is prevented with enlarging the contact area of the bead part and the rim. Air leakage of the tire is prevented, and slip is restricted with forming the air inflow groove.
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