| 摘要 |
<p>PURPOSE: To improve high speed performance, rolling resistance, anticorros anticorrosion, etc., by equalizing width of first and third plies of a belt package, including a polymer monofilament reinforcing member arranged at a first angle, decreasing the width of a second ply smaller than the former and including a metal reinforcing member at a second angle. CONSTITUTION: A first ply 16 on the extreme inside on a belt reinforcing package of a three layer belt type tire 11 is of the same shape as a third ply 17 on the extreme outside, and a second ply 18 smaller in side than them is provided between them. Additionally, an edge 21 of the third ply is made contact with the first ply 16. Additionally, reinforcing members of the plies 16, 17 are made into a polyamide monofilament 100, and the second ply 18 can include a metal cable 180 to be corroded as it is protected by the third ply 17. A first belt angleα1 against an equatorial surface E-E is made the same +15 deg. +20 deg. on the belt plies 16 and 17, and an angleα2 of the second ply 18 is made -15 to -25 deg. in the reverse direction.</p> |
