The WAHOO KICKR CORE Movement Rocker Plate Feet x 4 are custom-made accessories designed specifically for the KICKR CORE bike trainer. These black plastic riser feet are essential for providing stability and reducing vibrations during indoor cycling sessions. Perfect for cycling enthusiasts looking to enhance their training experience, these feet offer a secure and sturdy base for their bike trainer, allowing them to focus on their movements and performance without any distractions. Ideal for both amateur and professional cyclists, these WAHOO KICKR CORE Movement Rocker Plate Feet are a must-have addition to any home workout setup. -No tennis balls included -Use at your own risk -colour black