Brake disc for a bicycle

A brake disc for a bicycle comprising:

• a first component made of a first material and having a braking track configured to cooperate with brake pads;
• a second component made of a second material and having (i) a radially inner annular portion for coupling with a hub of a wheel of the bicycle and (ii) a plurality of radially outer portions for connecting to said first component at a respective plurality of connection portions of said first component;
• said first component further comprises a radially inner annular portion connected to said braking track,
• the brake disc further comprising axial locking members active on the radially inner annular portions of the first and second component to keep said radially inner annular portions of the first and of the second component under reciprocal pressure,
• said radially inner annular portion of said first component is connected to said braking track through a plurality of connection arms distinct from said plurality of connection portions,
• at least one of said connection arms of said first component and at least one of said radially outer connection portions of said second component are coupled together through at least one shape coupling including at least one housing seat made on one from said at least one connection arm and said at least one radially outer connection portion and housing a portion of the other from said at least one connection arm and said at least one radially outer connection portion.