The AB900 is a classic design of a classic modality. With its dynamic, air-driven resistance system, this air bike is a powerful tool for all types of training situations. From low RPM, low load rehabilitation to high performance, high Watt output interval training, it uses smooth air resistance to provide an efficient workout. Resistance matches the user’s effort and accommodates upper-body only and total body exercise. The compact design allows the Spirit AB900 Air Bike to be placed anywhere in a facility for easy programming integration..