Patent ID: 8672009

Claim:
A pneumatic radial ply tire comprising: a pair of beads each with an associated chafer; a single carcass ply folded about each bead so as to define a main body portion and a turnup portion associated with each bead; a tread disposed radially outward from the single carcass ply, the tread having shoulder portions disposed at axial outer edges of the tread; and a pair of sidewalls extending radially outward from each chafer to a location adjacent each shoulder portion, each sidewall being disposed axially outward of the single carcass ply, each sidewall comprising a first outer layer extending from the chafer to the shoulder portion and a second inner layer extending from the chafer to the shoulder portion, the second inner layer being disposed entirely between the single carcass ply and first outer layer, the second inner layer comprising a foamed structure of a rubber composition having a density ranging from 0.1 to 1.0 g/cm 3 .