Tire with two treads and groove of adapted shape

摘要

In order to improve the fatigue strength of the bottom (80) of the groove (8) which is located axially between the two treads (1A) (1B) of the of the same tire and which extends radially over a reinforcement wire (7) which is located axially at the level of the equatorial plane (XX') of the tire, and below which the carcass reinforcement (10) passes, said groove (8) has a special meridian configuration in combination with the radial position of the center of gravity of the reinforcement wire (7).