(CPO) Matrix R5x Recumbent Bike Cycle(CPO) Matrix R5x Recumbent Bike Cycle The (Certified Pre Owned) Matrix R5x Recumbent Bike is designed to provide consistent training and workout advantage to users who desire to burn fat, improve mobility and increase body strength and endurance. The Matrix R5x comes equipped with ergonomic functions that help members achieve faster fitness results without harming their joints, knees and bones in the process. Ergonomic Design: The Matrix R5x Recumbent