Patent ID: 8813803

Claim:
A pneumatic tire comprising a left-right pair of bead portions, a side wall portion continuous with the bead portions, and a tread portion connected to the side wall portion, a carcass layer being mounted between the left-right bead portions: wherein a foam rubber layer extending in a tire radial direction is disposed in at least a portion of the side wall portion, heat conductivity at 23° C. of the foam rubber layer is from 0.05 to 0.20 W/mK, a tan δ at 60° C. of the foam rubber layer is not more than 0.17, and an expansion ratio Q as defined in formula (I) below is from 50 to 160%: Expansion ratio Q (%)=[( D 0 /D 1)−1]×100 (1) wherein, D 0 is a specific weight of the foam rubber layer before foaming and D 1 is a specific weight after foaming.