The innermost carcass ply of a runflat tire (50) having a radial carcass
ply is a discontinuous ply (52) that includes two portions (52a, 52b)
each disposed within one of the sidewalls (43, 45). In one embodiment,
each of the two discontinuous ply portions is composed of two layers (64,
66) of cross-biased cords (65, 67) which are disposed between the two
wedge inserts (58b, 59b) in each sidewall. In another embodiment, the two
portions (72a, 72b) of the discontinuous ply (72) are composed of wavy
metal cords. In a third embodiment, a runflat tire incorporating either
embodiment of the discontinuous ply (92a, 92b) is built using the locked,
tie-in construction for the carcass ply.