Regroovable tread and processes for obtaining such

A tire including a tread and a carcass reinforcement surmounted by a crown reinforcement, the tread provided on its running surface with a plurality of tread grooves of depth h;

• the grooves including at least circumferential grooves separated axially by ribs;
• the tread comprising at least one internal anti-rubber-on-rubber connection element comprising two branch portions each having radially inner and outer ends and a common part interconnecting the radially inner ends, the two branch portions separated axially and forming, together with the common part, a space which delimits a volume of filler material occupying said space;
• said filler material being removable from said space for creating a regrooving groove;
• said at least one anti-connection element, when viewed in a meridian section, having in part a contour identical to the contour of a wall of the regrooving groove;
• the radially outermost portion of said at least one anti-connection element located farthest from the tire's axis of rotation being spaced from the running surface by a distance h1 which is less than the depth h of the grooves;
• the radially innermost portion of said at least one anti-connection element located closest to the axis of rotation being spaced from the running surface by a maximum regrooving height H;
• wherein said at least one anti-connection element includes circumferentially separated sections which enables rubber of said tread to form a retaining portion circumferentially between the sections and at a location radially inwardly of the radially outermost portion of said at least one anti-connection element;
• the recess arrangement positioned such that during tire travel when said radially outermost ends of said branch portions open on to the running surface after tread wear to expose the space, said retaining portion resists radial forces tending to eject said filler material from said space.