Pneumatic radial tire with tread of three equal portions

摘要

A pneumatic radial tire comprising a carcass and a belt comprising belt plies composed of steel belt cords wherein at least two circumferential grooves are constructed in the tread part continuously in the direction of the tire's equator, and lateral grooves in some parts defined by dividing the tread part in the direction of the tire's axis into approximately three. The tire prevents one-side drifting of a car in driving, improves a straight-forward driving performance.