Abstract: A bicycle rear brake cable mechanism comprises a first cable secured to a brake lever, a second cable secured to a swivel, a third cable secured to swivel, and a fourth cable; an upper brake on the joint of first and second cables and comprising a first fastener secured to first cable, and a first engagement member secured to first fastener and having a fork section clung to second cable; and a lower brake comprising a first section on rear brake, first section including a second fastener with fourth cable passed through, and a second engagement member secured to second fastener and having a fork section secured to one end of fourth cable; and a second section including a third fastener secured to the other end of fourth cable, and a third engagement member including an aperture with third fastener passed through and a fork section clung to third cable.