TIRE
DRIVE
October 16, 2024
A tire comprising a tread part, and at least one outermost surface member other than the tread part, wherein each of a rubber composition constituting the tread part and a rubber composition constituting the at least one outermost surface member other than the tread part comprises a rubber component comprising a diene-based rubber and a multi-component polymer, the multi-component polymer comprising an aromatic vinyl unit, a nonconjugated olefin unit, and a conjugated diene unit, and wherein, when, for each of individual rubber components constituting the rubber component of the tread part, a value obtained by multiplying a mass fraction in the rubber component and the aromatic vinyl unit content (% by mass) is calculated and these values are summed to calculate an aromatic vinyl unit content T (% by mass) in the rubber component of the tread part, and, on the other hand, an aromatic vinyl unit content OMM (% by mass) in the rubber component of the at least one outermost surface member other than the tread part is similarly calculated, T is greater than OMM. The tire is a tire having an improved crack resistance.
Discussion in the ATmosphere