Patent ID: 9643458
Date: 2017-05-09
CPC Classifications: B60C

Claim:
1. A tire comprising: a tread section provided with a groove portion formed to extend in a tire circumferential direction; and a plurality of projection parts provided on a groove bottom of the groove portion, wherein each of the projection parts extends from one of side walls forming the groove portion toward the other side wall opposed to the one side wall, the projection parts are arranged at predetermined intervals in the groove portion, a relationship of 0.75 L≦P≦10 L is satisfied in a tread face view of the tire, where L denotes a length of the projection parts along a groove center line passing a widthwise center of the groove portion, and P denotes the predetermined intervals, a relationship of 0.4≦FW/W<1 is satisfied, where W denotes a groove width of the groove portion and FW denotes a length of the projection parts in an orthogonal direction which is orthogonal to the extending direction of the groove portion, wherein each of projection parts is separated into plural projection segments in a tread face view and is provided with an opening which is formed in a center of the projection part in an extending direction of the projection part, and an angle θf is 10 degrees to 60 degrees, both inclusive, where θf denotes an angle that the extending direction of the projection parts and the groove center line form in a direction opposite to a rotation direction of the tire in a tread face view of the tire.