RADIAL TYRE

摘要

The present invention provides an optimum radial tyre which is suitable for most cars. In the present invention, an a value is introduced as indicating the properties of the car and the tread rubber of the tyre is selected according to the .alpha. value. Accordingly, the present invention provides a radial tyre which comprises a tread and sidewall, wherein the tread has the claimed relation between a viscoelasticity (tan .delta.) peak temperature (Tg) and an a value which indicates the properties of a car, and a one side half width (w/2) near the tan .delta. peak temperature of 25 deg or less.