Arrangement of a wheel hub connected to constant velocity joint provided with a seal device, comprising an inner ring and an outer ring and a sealing assembly interposed between the inner ring and the outer ring of the wheel hub and which extends straddling in use between the wheel hub and an outer ring of the constant velocity joint; wherein the sealing assembly comprises a first shield and a second shield anchored by means of their respective sleeve portions (17, 117) to the inner ring and to the outer ring of the wheel hub, respectively, and having each a respective flange portion (18, 118) which radially extends so as to protrude from the sleeve portion and towards the other shield, and an annular sealing element carried by one of the first and second shields and which is provided with a plurality of annular sealing lips (22, 23, 24) which cooperate with the other shield; the flange portion of the first shield externally carrying at a side facing in use towards the constant velocity joint a signal generating element consisting of an annular insert; and the sleeve portion of the first shield comprising a first stretch defined by a first L-shaped fold which axially extends so as to protrude from the flange portion and towards the second shield, and a second stretch defined by a U-shaped fold, radially overlapping in contact with the stretch defined by the first L-shaped fold on the side of the inner ring and which axially extends backwards with respect to the first L-shaped fold, in use towards the constant velocity joint and beyond the flange portion, the second stretch ending, on a side opposite to the first stretch, with a second L-shaped fold, which extends radially towards the interior of the sleeve portion and axially protrudes from the inner ring and with respect to the flange portion in use towards the constant velocity joint, thus forming a tubular element adapted to arrange in use straddling between the wheel hub and the constant velocity joint, concentric with the inner ring; wherein the annular insert forming the signal generating element is provided as an annular insert having predetermined thickness, measured in the axial direction, of a magnetizable elastomeric or synthetic plastic material, which axially protrudes from the first face of the flange portion of the first shield to which the annular insert has been chemically anchored, and is shaped so as to completely cover the first face and extend onto the second L-shaped fold; characterized in that, in combination, i)- the seal device comprises a stretch of a radially outer lateral surface of the inner ring on which an annular step is obtained on the side in use of the constant velocity joint and at an end of the inner ring facing in use the constant velocity joint; ii)- the second L-shaped fold is accommodated with axial clearance into the annular step and is shaped so as to define with a first wing thereof, parallel to the flange portion of the first shield, a first axial and annular shoulder, facing in use the constant velocity joint and arranged axially spaced apart from a second axial shoulder, defined by the annular step, the first axial shoulder axially protruding into the annular step with respect to a first face of the flange portion of the first shield facing the side opposite to the first stretch of the sleeve portion of the first shield; iii)- the sleeve portion of the first shield is fluid-tightly fitted onto the radially outer lateral surface of the inner ring, outside the annular step and in a position immediately adjacent to the annular step; iv)- the annular insert extends onto the second L-shaped fold so as to also cover the first axial shoulder defined by the first wing of the second L-shaped fold. i)- the seal device comprises a stretch of a radially outer lateral surface of the inner ring on which an annular step is obtained on the side in use of the constant velocity joint and at an end of the inner ring facing in use the constant velocity joint; ii)- the second L-shaped fold is accommodated with axial clearance into the annular step and is shaped so as to define with a first wing thereof, parallel to the flange portion of the first shield, a first axial and annular shoulder, facing in use the constant velocity joint and arranged axially spaced apart from a second axial shoulder, defined by the annular step, the first axial shoulder axially protruding into the annular step with respect to a first face of the flange portion of the first shield facing the side opposite to the first stretch of the sleeve portion of the first shield; iii)- the sleeve portion of the first shield is fluid-tightly fitted onto the radially outer lateral surface of the inner ring, outside the annular step and in a position immediately adjacent to the annular step; iv)- the annular insert extends onto the second L-shaped fold so as to also cover the first axial shoulder defined by the first wing of the second L-shaped fold.