Pneumatic radical tire for passenger car with carcass ply cut-out zone

A pneumatic radial tire for passenager car comprising:

• a carcass of a radial structure torodally extending between a pair of bead cores and comprised of at least one rubberized carcass ply containing organic fiber cords therein, and a belt reinforcing a crown portion of the carcass and comprised of plural belt layers, at least one carcass ply has a cut-out zone it its crown portion, and a carcass supporting layer arranged adjacent to and radially outside the cut-out zone, said carcass supporting layer being a rubberized body containing a plurality of organic fiber cords having diameter of 0.1-0.5 mm.