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A flat tire (British English: ''flat tyre'') is a deflated pneumatic tire, which can cause the rim of the wheel to ride on the tire tread or the ground potentially resulting in loss of control of the vehicle or irreparable damage to the tire. The most common cause of a flat tire is puncturing of the tire by a sharp object, such as a nail, letting air escape. Depending on the size of the puncture, the tire may deflate slowly or rapidly.〔(AUTOS & BOATS : Tires : Tips: Tire Care and Preventing Flat Tires : DIY Network )〕 ==Other causes== * Failure of or damage to the valve stem; * Rubbing of the tire against the road, ripping the tire, or separation of tire and rim by collision with another object; * Excessive wear of the tire tread allowing explosive tire failure or allowing road debris to tear through it. Some tires, particularly those with a slow leak, can be repaired and re-inflated; others, especially those with worn tread, must be replaced. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「flat tire」の詳細全文を読む スポンサード リンク
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