Pneumatic tire for airplanes

摘要

A pneumatic tire for airplanes which can reduce a ratio of the load subjected to a tread center zone of the tire to the load subjected to two shoulder zones thereof and improve a high speed durability of the tire without sacrificing a wear resistance thereof is disclosed. The tire comprises a pair of circumferentially extending grooves each arranged at a shoulder portion of the tire and substantially symmetrically and equally spaced apart from a crown center of the tire. A distance between the circumferentially extending grooves is from 50% to 95%, preferably 55% to 80% of a tread width and serves to divide a tread portion of the tire into a center zone and two shoulder zones. The outer surfaces of the shoulder zones are protruded from the circumferentially extending grooves toward the outside thereof by a step having a level difference from 0.5 mm to 6 mm.