Bicycle brake disc comprising: a carrier having a connection portion configured for connection to a hub of a wheel of the bicycle rotatable about a rotation axis (X) and a plurality of coupling seats ; a rotor comprising a radially outer braking track and a plurality of radially inner coupling seats that at least partially axially overlap the coupling seats of the carrier to define connection areas ; wherein said rotor and said carrier are joined together by mechanical joints active in said connection areas ; and the constraint between at least one coupling seat of the rotor and a coupling seat of the carrier in a respective connection area having a degree of translational freedom characterized in that in said connection area having a degree of translational freedom, said coupling seat of the rotor and/or said coupling seat of the carrier has, or is defined by, a through hole having an elliptical shape configured to receive said mechanical joint and has a first dimension (D1) and a second dimension (D2), wherein the first (D1) and the second dimension (D2) are respectively measured on a first reference axis (A1) and a second reference axis (A2) lying on a first reference plane (P1) which is perpendicular to said rotation axis (X), wherein the second reference axis (A2) intersects the first reference axis (A1) at an intersection point (AF1), wherein said first dimension (D1) coincides with the larger axis of the elliptical shape of the through hole and is greater than the second dimension (D2) that coincides with the smaller axis of the elliptical shape of the through hole and wherein said degree of translational freedom is directed along the first reference axis (A1). a carrier having a connection portion configured for connection to a hub of a wheel of the bicycle rotatable about a rotation axis (X) and a plurality of coupling seats ; a rotor comprising a radially outer braking track and a plurality of radially inner coupling seats that at least partially axially overlap the coupling seats of the carrier to define connection areas ; wherein said rotor and said carrier are joined together by mechanical joints active in said connection areas ; and the constraint between at least one coupling seat of the rotor and a coupling seat of the carrier in a respective connection area having a degree of translational freedom characterized in that in said connection area having a degree of translational freedom, said coupling seat of the rotor and/or said coupling seat of the carrier has, or is defined by, a through hole having an elliptical shape configured to receive said mechanical joint and has a first dimension (D1) and a second dimension (D2), wherein the first (D1) and the second dimension (D2) are respectively measured on a first reference axis (A1) and a second reference axis (A2) lying on a first reference plane (P1) which is perpendicular to said rotation axis (X), wherein the second reference axis (A2) intersects the first reference axis (A1) at an intersection point (AF1), wherein said first dimension (D1) coincides with the larger axis of the elliptical shape of the through hole and is greater than the second dimension (D2) that coincides with the smaller axis of the elliptical shape of the through hole and wherein said degree of translational freedom is directed along the first reference axis (A1). <EOS>