Tyre having an axis of rotation and a median plane perpendicular to the axis of rotation, and comprising: - two beads; - two sidewalls connected to the beads; - a crown connected to the ends of the two sidewalls and having: • a crown reinforcement; and • a tread (9, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150) radially on the outside, the tread comprising: ∘ a plurality of tread pattern elements having lateral faces (11.1, 11.3, 12.1, 12.3, 13.1, 13.3, 14.1, 14.3) and a contact face intended to come into contact with the road surface while the tyre is being driven on; ∘ a plurality of circumferential grooves (11, 12, 13, 14), each of which is delimited by lateral faces of adjacent tread pattern elements that face one another, and is delimited by a bottom (11.2, 12.2, 13.2, 14.2); ∘ a circumferential reinforcement (20, 32, 42, 52, 62, 72, 82, 92, 102, 112, 122, 132) made up of a rubber mixture with a stiffness greater than the stiffness of the rubber mixture of the rest of the tread; characterized in that, the tyre having an outer side and an inner side, the circumferential reinforcement has a reinforcing element (22, 34, 36, 44, 46, 48, 54, 56, 58, 59, 64, 66, 68, 69, 74, 76, 78, 79, 84, 86, 88, 89, 94, 96, 98, 104, 106, 108, 114, 116, 117, 118, 119, 124, 126, 128, 129, 134, 136, 138, 139) positioned in the tread pattern elements disposed axially on the outside with respect to one of the first and second circumferential grooves of the tread from the outside to the inside and axially close to said circumferential groove, in that the reinforcing element extends radially from the radially outer surface of said crown reinforcement towards the outside of said tread with an axial width which decreases gradually and over a partial or total height of the thickness of the tread, in that the bottom of said circumferential groove is made up of same rubber mixture as the rest of the tread and in that the tread pattern elements disposed axially on the inside with respect to said first circumferential groove do not have reinforcing elements disposed close to the axially inner faces of said groove. - two beads; - two sidewalls connected to the beads; - a crown connected to the ends of the two sidewalls and having: • a crown reinforcement; and • a tread (9, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150) radially on the outside, the tread comprising: ∘ a plurality of tread pattern elements having lateral faces (11.1, 11.3, 12.1, 12.3, 13.1, 13.3, 14.1, 14.3) and a contact face intended to come into contact with the road surface while the tyre is being driven on; ∘ a plurality of circumferential grooves (11, 12, 13, 14), each of which is delimited by lateral faces of adjacent tread pattern elements that face one another, and is delimited by a bottom (11.2, 12.2, 13.2, 14.2); ∘ a circumferential reinforcement (20, 32, 42, 52, 62, 72, 82, 92, 102, 112, 122, 132) made up of a rubber mixture with a stiffness greater than the stiffness of the rubber mixture of the rest of the tread; • a crown reinforcement; and • a tread (9, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150) radially on the outside, the tread comprising: ∘ a plurality of tread pattern elements having lateral faces (11.1, 11.3, 12.1, 12.3, 13.1, 13.3, 14.1, 14.3) and a contact face intended to come into contact with the road surface while the tyre is being driven on; ∘ a plurality of circumferential grooves (11, 12, 13, 14), each of which is delimited by lateral faces of adjacent tread pattern elements that face one another, and is delimited by a bottom (11.2, 12.2, 13.2, 14.2); ∘ a circumferential reinforcement (20, 32, 42, 52, 62, 72, 82, 92, 102, 112, 122, 132) made up of a rubber mixture with a stiffness greater than the stiffness of the rubber mixture of the rest of the tread; ∘ a plurality of tread pattern elements having lateral faces (11.1, 11.3, 12.1, 12.3, 13.1, 13.3, 14.1, 14.3) and a contact face intended to come into contact with the road surface while the tyre is being driven on; ∘ a plurality of circumferential grooves (11, 12, 13, 14), each of which is delimited by lateral faces of adjacent tread pattern elements that face one another, and is delimited by a bottom (11.2, 12.2, 13.2, 14.2); ∘ a circumferential reinforcement (20, 32, 42, 52, 62, 72, 82, 92, 102, 112, 122, 132) made up of a rubber mixture with a stiffness greater than the stiffness of the rubber mixture of the rest of the tread;