Abstract: A bicycle sound system is provided including a tote bag adapted for being removably mounted on a bicycle. Also included is a portable audio unit removably positioned within the tote bag for transmitting audio signals from an output thereof upon the receipt of power. Next provided is a speaker unit adapted for being mounted to the bicycle and connected to the portable audio unit via connector wires for audibly transmitting audio signals upon the receipt thereof in combination with the receipt of power. A rechargeable battery pack is mounted on the bicycle for power purposes. A switch unit is adapted for being mounted on one handle bars of the bicycle adjacent to a handle grip thereof. Such switch unit includes a switch connected between the battery pack and the portable audio unit and the speaker unit via connector wires for providing the portable audio unit and the speaker unit with power upon the depression thereof.