High athletic performance tire with all-weather performance

摘要

A pneumatic tire having a good all-weather running performance utilizes in the tire tread a vulcanized rubber composition containing 2-30 parts by weight of a low-temperature ester type softener, based on 100 parts by weight of a rubber blend of 10-90 parts by weight of at least one diene rubber having a glass transition temperature (Tg) of not more than -65 DEG C and 90-10 parts by weight of at least one diene rubber having a Tg of not less than -55 DEG C, the vulcanized rubber having an elastic modulus of not more than 50 kg/cm2 at -20 DEG C under elongation of 100% and a loss tangent (tan delta ) of not less than 0.3. Further, in order to improve the brakability on wet roads, a predetermined amount of butyl rubber or halogenated butyl rubber can be compounded with the above rubber blend.