TIRE

DRIVE November 19, 2025
Source
Provided is a tire with excellent durability during high-speed driving. A tire includes a cap tread and a band layer containing a polyethylene terephthalate fiber cord. The polyethylene terephthalate fiber cord in the band layer has a residual strain E in the band layer of 2.0% or higher. The polyethylene terephthalate fiber cord taken out of the band layer has a stress-strain curve at 100°C in which the slope d at the residual strain E in the band layer is 2.0 cN/(tex-%) or greater. The tire satisfies the following relationship (1): E×d/tanδt > 30 where E (%) is the residual strain as defined above, d (cN/(tex·%)) is the slope as defined above, and tanδt is the loss tangent of the cap tread measured at a temperature of 30°C, an initial strain of 10%, a dynamic strain of 1%, and a frequency of 10 Hz in extension mode.

Discussion in the ATmosphere

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