Importance

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Abstract

Provided is a pneumatic tire that has reduced rolling resistance during high-speed running as well as excellent durability performance. This pneumatic tire comprises a sidewall and a clinch section in each of a pair of side sections. When the loss tangent of the sidewall is tan δsw and the loss tangent of the clinch section is tan δc when measured under the conditions of 70° C., a frequency of 10 Hz, an initial strain of 5%, and a dynamic strain rate of 1%, then (tan δsw+tan δc)≤0.3 and |tan δsw−tan δc|≤0.07. When the cross-sectional width of the tire is Wt (mm) and the external diameter is Dt (mm) when the pneumatic tire is installed on a standardized rim and internal pressure is set to 250 kPa, and if the volume of space occupied by the tire is a virtual volume V (mm³), then (formula 1) and (formula 2) are satisfied.

description='In-line Formulae' end='lead'1700≤(Dt²×π/4)/Wt≤2827.4  (formula 1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'[(V+1.5×10⁷)/Wt]≤2.88×10⁵  (formula 2).description='In-line Formulae' end='tail'

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