Rock Hard 4x4 Parts 3rd Brake Light RH2002-TL In order to install an optional 3rd brake light, the center hole on your wheel must be 2 - 1/2 or larger;Installation only requires you to splice the light onto your factory light wiring;Longer wires, screws and required connectors are included Rock Hard 4x4 Parts Rock Hard 4x4 Parts Rear Bumper/Tire Carrier 3rd Brake Light - RH2002-TL RH2002-TL Tire Carriers