The Recumbent Exercise Bicycle Attachment (REBA) connects to an upright flywheel type exercise bicycle which utilizes one knob friction brake control. The functionality of the existing upright bicycle is maintained by using the REBA's modified interchangeable controls. The pedals that turn the flywheel and the resistance control of the bicycle are accessed from the REBA by utilizing the seat and rear control which are a part of the REBA. The REBA allows the user to ride either in the upright cycling position or the recumbent cycling position on one machine.