JetBlack Trainer 4-Way RockerWe have designed this new Rocker Plate to mimic the small movements you and your bike experience outdoors. Removing pressure points helps you ride longer and stronger. The three plate design is not only good for storage and logistics, but enables us to add features other plates do not provide. It features a secure step for ease of mounting and dismounting and specific movements in the front and back plates to ensure a great riding experience.