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公开(公告)号:US20170087938A1
公开(公告)日:2017-03-30
申请号:US15315462
申请日:2015-06-02
Applicant: BRIDGESTONE CORPORATION
Inventor: Yuji OYAMA , Shinsuke ISOE
CPC classification number: B60C9/0042 , B60C9/08 , B60C2009/0425 , B60C2009/0466 , D02G3/48
Abstract: Provided is a pneumatic tire in which a cord including an aramid fiber is used for a reinforcing cord for a carcass ply, and the cut resistance, the steering stability, and the light-weightness are improved. Provided is a pneumatic tire 10 including a carcass 4 composed of at least one carcass ply as a skeleton, and a reinforcing cord of the carcass ply includes an aramid fiber, and the upper twist coefficient T represented by the following formula: T=N×√{(0.125×D/2)/ρ}×10−3 (in the formula, N represents the twist count (count/10 cm) of the cord, D represents the total fineness of the cord, and ρ represents the density of the cord) is 0.5 or higher, the total fineness is 1,800 dtex or lower, and the end count of the reinforcing cord in the carcass ply is 55 counts/5 cm or larger.