RUBBER COMPOSITION FOR BASE TREAD AND TIRE

Provide is a rubber composition for base tread which is excellent in rolling resistance properties and can improve pass-by noise when applying the rubber composition for base tread to a tire. Disclosed is a rubber composition for base tread used for a base tread of a tread portion of a tire, where a ratio of tanδ at 0 °C (0 °C tanδ) to tanδ at 30 °C (30 °C tanδ) (0 °C tanδ/30 °C tanδ) is 2.90 or more.