| 摘要 |
A tire having a form ratio under 0.80, a metallic radial carcass reinforcement, and a working crown reinforcement of two working plies formed of non-extensible reinforcement elements oriented at angles alpha and alpha', with axial widths in the ranges between 0.65So to 0.80So and 0.35So to 0.45So, So being the maximum axial width of the median line of the carcass reinforcement, and two half-plies of non-extensible metallic elements making an angle beta with the circumferential direction, where beta is less than angles alpha, alpha' by at least 2°, and is opposite to angle alpha of the widest axially continuous working ply, the half-plies located on either side of the equatorial plane XX' having axial widths between 0.22So and 0.35So, and axially inside edges separated from the equatorial plane XX' by a distance equal to half the width of the narrower working ply less an amount of at least 0.05So. |
