Abstract: A brake disc comprises a cylindrical hub, two parallel friction rings, and a plurality of spokes joining the hub to the friction rings. The spokes having an I-beam shaped cross section taken parallel to the hub axis.

Abstract: A one-piece brake disc comprised of a hub having a predetermined width. A predetermined plurality of connecting spokes having a predetermined configuration are provided. The connecting spokes have a first end thereof disposed at and connected to predetermined locations around an outer periphery of the hub. There is a friction ring having two radially opposed annular members. Each of the annular members includes an outer braking surface and an inner surface connected to radially opposed outer edge surfaces of the predetermined plurality of connecting spokes. A predetermined plurality of fins having a predetermined configuration are disposed between the inner surfaces of the two radially opposed annular members and between adjacently disposed surfaces of the connecting spokes.