To highly demonstrate a rigid feeling and a light feeling in the steering stability while easily controlling elongation characteristics, and suppressing an increase in weight to be low.

A radial tire comprises a core consisting of an aramid fiber cord part with aramid fibers twisted with each other and an outer layer consisting of one steel cord part with a plurality of steel strand twisted with each other and wounded around the core. The degree of elongation at 50 N load is set to be 0.5-0.7%, the degree of elongation at 100 N load is set to be 1.25-1.6%, and the degree of elongation at 300N load is set to be 2.0-2.6%, respectively.