公开(公告)号：US20170120684A1

公开(公告)日：2017-05-04

申请号：US15317465

申请日：2015-05-25

Applicant: BRIDGESTONE CORPORATION

Inventor： Shinsaku KATAYAMA ,  Yoshio KAJI ,  Takayuki KURATA

IPC: B60C11/03 ,  B60C11/12

CPC classification number: B60C11/0302 ,  B60C11/03 ,  B60C11/033 ,  B60C11/0332 ,  B60C11/12 ,  B60C11/1236 ,  B60C2011/0344 ,  B60C2011/0374

Abstract: A tire having V-shaped lug grooves displays both improved grip performance on snow and anti-hydroplaning performance. To that end, an absolute value of difference between a lug groove diagonal angle (θLG), which is an angle of diagonal lug grooves (13) in a tread (11) surface with respect to a tire axial direction, and a profile line diagonal angle (θFP), which is an angle of a normal line of a leading-end profile line of a contact patch shape of the tire (10) with respect to the tire axial direction, is set to 0° or more and 60° or less at respective positions in the tire axial direction. And diagonal lug grooves (13) are formed such that absolute values of difference in a center portion, which is defined to be 20% in width of a contact patch width (W) with an equatorial plane at a center, and an intermediate portion, which is defined to be 20% of the contact patch width (W) on each axially outer side adjacent to the center portion, are larger than an absolute value of difference in a shoulder portion, which is defined to be 20% of the contact patch width (W) on each axially outer side adjacent to the intermediate portion.