tread for pneumatic 'heavyweight' midveins are equipped with inclinees incisions.

摘要

In order to improve the wear of the trailing edges of the raised elements of a tread (1) for a "heavy duty" tyre, which elements are defined axially by circumferential grooves and circumferentially by incisions (30) of non-zero width no greater than 3 mm, the said incisions (30) are inclined with respect to the normal (P) to the surface of the tread at an angle alpha lying between 5 DEG and 25 DEG so that the resultant force (FF, FM) exerted by the ground on the tread tends to straighten the incisions (30) toward a zero inclination. The inclination of the incisions (30) proves to be particularly advantageous in the case of a tread (1) provided with wide circumferential grooves equipped with a projection (L). Application to steered, load-bearing or driven tyres. IMAGE