ReveD RDX Option Parts ReveD Spacer Included This is a carbon servo rod for the RDX! It is used when changing the servo mounting position from the stock front side to the rear of the chassis. By moving the heavy servo to the rear of the chassis, the weight distribution of the machine becomes more rearward, effectively improving the front rolling and rear traction. The lightweight and highly rigid carbon rod transmits the servo's power to the bell crank without waste, and the aluminum screws with SE (Shiny Edge) processing at both ends of the rod add a touch of luxury. Please try the carbon servo rod, which changes the servo mounting position and contributes to improved rear traction of the machine!