公开(公告)号：US5405899A

公开(公告)日：1995-04-11

申请号：US653516

申请日：1991-02-11

申请人： Yuichi Saito ,  Susumu Watanuma ,  Naohiko Kikuchi ,  Hiroyuki Noma

发明人： Yuichi Saito ,  Susumu Watanuma ,  Naohiko Kikuchi ,  Hiroyuki Noma

IPC分类号： G01N19/00 ,  B60C1/00 ,  B60C11/00 ,  B62D61/00 ,  C08K3/04

CPC分类号： B60C1/0016

摘要： The present invention provides an optimum radial tire which is suitable for each car. In the present invention, an .alpha. value is introduced as indicating the properties of the car and the tread rubber of the tire is selected according to the .alpha. value. Accordingly, the present invention provides a radial tire which comprises a tread and sidewall, wherein the tread has the claimed relation between a viscoelasticity (tan .delta.) peak temperature (Tp) and an .alpha. value which indicates the properties of a car, and a one side half width (w/2) of 25.degree. C. or less, the one side half width (W/2) being defined with respect to a viscoelasticity distribution curve as the distance along the 1/2 peak tan .delta. viscoelasticity line from the perpendicular line representing (Tp) to the intersection with the viscoelasticity distribution curve to the right of the perpendicular line.