To provide a pneumatic radial tire which has simple configuration and besides, has improved driving stability.
In a pneumatic radial tire 1, bead parts includes respective bead cores 13a and 23a and bead fillers 13b and 23b, and a carcass layer 5 includes :carcass body parts 15a and 25a extending from a tire central line CL to an inner end in the tire radial direction of the bead cores; and carcass folded portions 15b and 25b folded at an inner end in the tire radial direction of the bead cores. An outer carcass periphery length Ca2 is longer than an inner carcass periphery length Ca1, the length of the inner carcass folded portions 15b is longer than the length of the outer folding part 25b, and the height BH1 in the tire radial direction of an inner bed part 13 is higher than the height H2 in the tire radial direction of the bead filler 23a of an outer bead part 23.
Iwa Saki Kokuni
Shunichi Takahashi
Masakazu Ito
Toshio Takamatsu