| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce rolling resistance and improve center abrasion resistance and shoulder abrasion resistance. <P>SOLUTION: When an intersection of a line extended from a shoulder arc 21b and a line extended from a side-part arc 21d is set as a reference point P, the following conditions are satisfied: 0.025×β+1.0≤θ≤0.045×β+2.5, wherein θ is an angle between a straight line A connecting the reference point and a center crown CC and a tire-width-direction straight line B passing through the center crown, with respect to an aspect ratio β; 12≤Rc/Rs≤30, wherein RC is a curvature radius of a middle arc 21a and RS is a curvature radius of the shoulder arc; and 0.2≤L/(TDW/2)≤0.7, wherein L is the reference development width from an equatorial plane CL of a tire to a tire-width-direction inside end of the shoulder arc, and TDW is a tread development width. <P>COPYRIGHT: (C)2012,JPO&INPIT |
