Abstract: A brake system for a bicycle includes a frame with two blocks received therein side by side, each of the two blocks having a protrusion extending from the rear end thereof so that a bridge member is mounted to the two protrusions. Two cables each have one end thereof connected to the respective block and the other end thereof extends through the top of the frame and is connected to the respective brake handle. A rear brake cable connected with the rear brake mechanism is connected to the bridge member and a front brake cable connected with the front brake mechanism movably extends between the two blocks. When either one of the first cable or the second cable is pulled, one of the blocks and the bridge member are moved so that the rear brake mechanism is first operated.